Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ffbb5ae7def34a2…

MALICIOUS

PDF

133.0 KB Created: 2021-07-07 14:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fa6bb2a784ced99a047bf18f326a80d9 SHA-1: b9971d0081a3e4fb9d6f2b226c701a40d2cad75d SHA-256: 8ffbb5ae7def34a2eff0dddc53392bb639d103ad20c2a1dd9372a415b0b0f67a
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of an advance-fee scam, including language related to lotteries, prizes, and courier delivery requirements. The presence of numerous links to potentially compromised WordPress sites and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent. While no scripts were explicitly extracted, the document's structure and heuristic firings suggest it is designed to deceive users into fraudulent financial transactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/3knu228hsf9faa9r49hg8ermuh/meduvajawedawun.pdf In PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609413d790a72---14013803171.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/b561d2fb5176c250d856f46016aebfa0/wofuv.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0b0b40f0f---50916090250.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/tovedesiruzedobebos.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/ec94de33dc4baafe26cc24e36a00dc89/vamowamajabubigija.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/76911829831.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/efe2718279c505241e68e9f6890f1f22/fojuzepawopavol.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/gigajejogonesivevopodufi.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/vekapisikesiro.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160805d7f4e55b---97011034896.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e32d6bb0f8d---76018230724.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/puranadexafabuk.pdfIn PDF document text
    • http://gangwonbnb.com/FileData/ckfinder/files/20210610_D0F8C89AC3FF73D7.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1e2fbe8fe---5800678635.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/36f4c019525bef1b9c0e1f5adefda17f/ravomamitinifekuxojopunej.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/c8a151c2ffc1c8b4c7817a1fb172df9c/87036829399.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/78425874960de0c8caf985.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/20976999676.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/zoravo.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/a0972b78b7d812aa5a563af783ef64a7/25951659194.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bf3287d76---badivasalagideminedufubit.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/rk151912nigb9okp26nrlel6cp/62727765111.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/80049852496.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=fortnite+annual+passPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D73 20048 bytes
SHA-256: cf5283203ce4b949e3dcb780aed4ac3fa8b727ef7828ee7ab8790e5033d5ff7f
font_01_sfnt_off0001c10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C10A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001d91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D91B 16216 bytes
SHA-256: 8c2e9d80d580d08964a5048de7b59c27befd741f1c379efd0abbd599686b3e88
font_03_sfnt_off0001eec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EEC9 10324 bytes
SHA-256: 96ab39c7962b42df91db40f8c6a001f7510eda034b48c8875e08f80011211dd1

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