Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a4e37574f774be…

MALICIOUS

PDF

76.0 KB Created: 2021-03-28 08:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c32dbf87d8d132a847631f35d18c4287 SHA-1: 98eeea8d48411312b10d0213f3a79d5b4fc68d91 SHA-256: 93a4e37574f774be64511db62c4af2a0ea3cd6c6f9eeea5b78da611c43a52e83
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://vilenefex.ru/123?utm_term=burrito+bison+hacked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454691/normal_604a2f518ff62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489850/normal_60480325f132c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416132/normal_603c100cdf75e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384470/normal_5fe2effbb4d0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_6011374c13233.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379032/normal_5fdeda9201035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382418/normal_604356705ee36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459027/normal_6007bcb5eaf4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459792/normal_60579925c2474.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425908/normal_600921d8432c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea642bdf-8663-4cef-b95a-f013817402c1/jidivifurufaragika.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_f6ebd5b71ee2449aadab9e4ba2fe78a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6975e005-e239-48a9-92f6-6dc88454ff21/2014_jeep_patriot_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/omron_h3cr-a8e_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc5f5cb-faf2-4bff-a50e-754c8f8ba37d/37573088866.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/90171188500.pdfIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_f8500deb8e2a4864bf62724b2d344b0b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39e2535-8248-4762-810a-6f3991f07160/what_is_meant_by_conflict_plot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3193c4e1-ce9a-457b-bfe8-d32bf3b9f5a8/32042096473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71f5c24e-be9c-4c70-ae12-b7f4a9e03b61/nike_air_force_1_love_letter_release_date_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b358ee5-09d8-4b58-9532-03c08a2fd477/ludaregude.pdfIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_85859a5d427047798965eaddec133a70.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 5248 bytes
SHA-256: 62efc67c43ef6dd696cb39e53e31a1e5f88d9090fadcb7547335135ceec069bd
font_01_sfnt_off0000fe64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE64 10612 bytes
SHA-256: ea8b6ab471bccf1f3d1d94b3e1aba4dc35260e73a63626d6f6061f10c943d3e5

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