Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96c951bd1df010d…

MALICIOUS

PDF

92.0 KB Created: 2021-03-15 03:22:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 542fd4263c83bb774144379b5c16aeca SHA-1: 958ea7dee2da6acea461ea4b15c7a32f54db5f31 SHA-256: c96c951bd1df010d866b6445972959a89ebec193633dd62ad0b86943d99d27c7
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 0.9998

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://jumiwimov.ru/strik?utm_term=e-myth+revisited+chapter+summary PDF link annotation
    • https://cdn.sqhk.co/vibisidumes/iggwghw/37861211601.pdfIn PDF document text
    • https://cdn.sqhk.co/pikuresob/jknukZk/musuvuresavibuniwedemevax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408865/normal_60352888b3192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403260/normal_601fe80e6727d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381320/normal_6002be266af5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_602af8069d92a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/el_alfabeto_hebreo_y_su_significado.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/compliance_policy_guide.pdfIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_21a215a0d9f743d38ae112084091f6fa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/bozekovezit.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/46322555040.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/pathophysiology_of_seizures_and_epilepsy.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/mivixamapi.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/7324687393.pdfIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_5310e6d911a74ff39b4db2802184ee41.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapijifas/pumatejibotoninajagilib.pdfIn PDF document text
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_550e31a8b4a948febc11fed4ee8c27ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/monstrous_meaning_in_tamil_language.pdfIn 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_off00012a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2E 5432 bytes
SHA-256: d2ed19e7685706b3f7be52c07800aed9f9c17cf26c5285823e4e81d5477754b2
font_01_sfnt_off00013c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C94 11348 bytes
SHA-256: b1147b5158700ffb62d08cde87732a399f978d48aa86027d45bdc0d8b34d2918

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