Malicious PDF — malware analysis report

Static analysis result for SHA-256 e612d965ed05fbee…

MALICIOUS

PDF

77.1 KB Created: 2021-03-22 22:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdcb1a9533ab4308fc3378b532feb2ca SHA-1: 899ccbbcca70c2bd477879548da5c55495b6beb4 SHA-256: e612d965ed05fbee3fd20a10de438d95f9595a336ecf0c1bc2985b694d41f792
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains a mass of external links, with one prominent URL pointing to zajinet.ru. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect the user to malicious content or phishing pages, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://zajinet.ru/strik?utm_term=halex+impact+electronic+dart+board
    • https://cdn-cms.f-static.net/uploads/4379603/normal_601321f02a6dd.pdf
    • https://static.s123-cdn-static.com/uploads/4367617/normal_5fcbcd1599893.pdf
    • https://fumeseteno.weebly.com/uploads/1/3/1/4/131483149/f5c17.pdf
    • https://cdn.sqhk.co/zeputefilu/fJHhbHg/minecraft_classic_browser_controls.pdf
    • https://cdn.sqhk.co/tutabudoxuwa/erp4Wgg/subujufifabatejivomev.pdf
    • https://cdn.sqhk.co/kakezesarop/hbssgeN/xujozapagawi.pdf
    • https://cdn.sqhk.co/vekepafate/idjhgeC/eureka_logograms_guide.pdf
    • https://tulixepatezapik.weebly.com/uploads/1/3/4/9/134902644/7f066f8021.pdf
    • https://static.s123-cdn-static.com/uploads/4490920/normal_5fce77bc6b7ff.pdf
    • https://cdn.sqhk.co/kimejijomaki/iihf3gh/98380109315.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_fcd6f5c4aed84341802dcaf0710ba20a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0b00b808-52f2-4e1f-8d17-d99a0778d7df/why_is_information_literacy_important_in_society.pdf
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_cfffcc7a9e1f446899c921e76623f70c.pdf?index=true
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_216f1bf0b12b4af29c29004192280c27.pdf?index=true
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_ba8f864f7715470883230e0e2def7e30.pdf?index=true
    • https://665985ba-8e9f-4173-b993-17a3090d61d7.filesusr.com/ugd/08421c_8a686e9adf11431f89842aff79deb076.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3f1a908f-5a4a-46b1-8829-c3f198f1f2d5/you_are_holy_oh_so_holy_chords.pdf
    • https://uploads.strikinglycdn.com/files/ca0a0b31-23e2-47f9-a79c-2720f4252331/sap_stock_valuation_report_transaction_code.pdf
    • https://uploads.strikinglycdn.com/files/6fea9872-16bc-41cc-907e-73feff375516/totebomema.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee64.bin
5cb9a36291249b038f7e5dbea7c4a13abc1b6f8ddc5931d37e1e3da01f333c11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE64 5208 bytes
font_01_sfnt_off0000fffc.bin
8abdf54a0ef96916d5ff61cd83d33251e33dcce79699ee62d130d866c2d2c286		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFC 11636 bytes

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