Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4b28c43bc148b3…

MALICIOUS

PDF

245.6 KB Created: 2021-07-08 03:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 94fbbc95df7994463e4127e27bcc24ea SHA-1: 1fda04c6eabe73941a07e705eef565092934b1f0 SHA-256: fa4b28c43bc148b3dfe0d1c7d55f0a41ba5ebf7817b0b0b7eb712c5fd902b573
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, and exhibits characteristics of a payment redirection lure. It contains multiple links to external PDFs hosted on compromised CMS upload directories, suggesting a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to exploit vulnerabilities or trick users into revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • 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 http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608336648498b---gukikexasijesalaxokuka.pdf In PDF document text
    • http://m-s-g.ru/userfiles/files/jukezibit.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/98a9st119uo4rlv1akm1to5cr2/1103314372.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90f576403e---jozel.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/cbe9f2f56d66cba9901fa788e078d17d/29446411384.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7544f6cd20---46896821229.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/10670893484.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2826dbe431---92221032876.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/felotumuxobixefobef.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160de499b60908---46232277212.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/12619ec3fbc316321c346ca56650c752/30054450104.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/1761168387e5beacb360bae4d5fd5ae7/jomususuw.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/98281392046.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/c60ae273c34ef8bf58f23ebfb2b97add/ravezoxumonixu.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608abecf0872a---56338523028.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b56866a48---33896501324.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b5c942499---71340642021.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8ada25f61---kuzevopisemad.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/40801694928.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/5a3aeae1c94008d4d4def61bd9e72ab2/99639323726.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/nexalobokax.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608155da9ee15---zakul.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d14da9b86---valujerusenaxalilimele.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160ac403deea71---duwawetanoj.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/89532580915.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/23433112556.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/94314173556.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=one+upon+wall+street+free+pdf+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003670f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3670F 18380 bytes
SHA-256: cba916f1ccf93cca822fbe37d3f4f9d07f8406192929aefcc947b4dc730a5ac7
font_01_sfnt_off00039759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39759 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003af70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AF70 10612 bytes
SHA-256: ee731407889466c574ec0c36c3eaf863ae698c1e5a9f0862c9aac8758d303d4e

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