Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0edd7c6f3c9fb58…

MALICIOUS

PDF

76.3 KB Created: 2021-09-02 02:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7158da2ac50148e73504b479e70b9446 SHA-1: 3f2430d44c92e4edd11bb5e26bc38260f35b6bf5 SHA-256: a0edd7c6f3c9fb58327a58e10f9718e3278fdc421283d2a5e944519d01c5da5e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to compromised CMS uploads and disposable hosting sites, likely to download further malicious payloads. The presence of multiple embedded URLs and the 'SE_CALLBACK_LURE' heuristic suggest a phishing or scam attempt, potentially disguised as a job application or similar document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://esoftland.com/userfiles/file/69454295220.pdf In PDF document text
    • https://edusfera.pl/upload/file/72845356268.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/6rv2k1h7qfhuubv559u33edkvq/wekadazabewizajexajuxovov.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2189f37140---13680443472.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16080a19534d68---84086208480.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a90776ed6---7785818625.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/935ec74e087de97cf255f1e0c45c4a17/nigoxijanozuximav.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/d76d8cc2dfd45a60cfc06e058d5dfe2c/mufifugivizixeguzipex.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/89472322761.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/nebipimoxopomudosusi.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079973ed73a5---telodumuxupod.pdfIn PDF document text
    • http://mopron.ru/upload/files/vixisodigakipowuxisurovit.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/58237639927.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/21470158925.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/2s914ebrdjvfnqsp3pnvvauv25/13828833195.pdfIn PDF document text
    • https://people11people.gr/uploads/File/veverepusinoberow.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8a2108bd3---56255683.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d6cdc72014f---rezinupexilevalike.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wevev.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/e39qc9c35h9bp3nv7jmu3b36q2/vizavibetiru.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/25189597454.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad002def20---80313767734.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/nexavukifedokob.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021821555138436.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/99514264508.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/wiwepupetesilij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=cover+letter+sample+for+teaching+job+application+in+word+formatPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64B 16240 bytes
SHA-256: 818b4da81ff3df18e74ffc8062a6a1c2ce3d3a7533de66493e31e5bb73db8c43
font_01_sfnt_off0000eff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 11520 bytes
SHA-256: 129292ebb71570b8655beaeda4b93cd6954060f2714a3c776406d8d52c7452bd
font_02_sfnt_off00010ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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