Malicious PDF — malware analysis report

Static analysis result for SHA-256 465bb9ee98b0f74e…

MALICIOUS

PDF

84.8 KB Created: 2021-03-22 12:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d3ffbfe9a8b1d11cfc2088fe5f1342f2 SHA-1: b9609d94ffd640781f919883c4d4a677d8298fe0 SHA-256: 465bb9ee98b0f74e2945797b96d2bbb1dba83b041881915cbe3943b4426f46c3
164 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. It uses an urgency-based lure. 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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://soxebez.ru/strik?utm_term=gracie+barra+curriculum PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367680/normal_5ff3b9da3cff8.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/surikuled.pdfIn PDF document text
    • http://fozivot.mypressonline.com/89881049767.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496225/normal_5ff41c1ba6416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415782/normal_60141ed28ef6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410186/normal_6035e2355b670.pdfIn PDF document text
    • https://kinanufojakosek.weebly.com/uploads/1/3/4/3/134350472/8152665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467322/normal_5fdc0240d6289.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448347/normal_5ff50e22833af.pdfIn PDF document text
    • https://muwemobivom.weebly.com/uploads/1/3/0/7/130776082/wuriwoxuvuk_selowugirox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_6033ea95b2d20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_5ffbd273a2b18.pdfIn PDF document text
    • https://kuxozofaxaxasij.weebly.com/uploads/1/3/5/3/135325708/binufekosodera_jonemoratani_wusafokofa.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/waduzirader/carbs_in_dunkin_donuts_boston_kreme.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/67494773357.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/2003_ford_focus_zx5_review.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/maxadigisedumabigaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/waborozegowudu.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/6513992533.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/9981501936.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/13436507271.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_off00011076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11076 4940 bytes
SHA-256: 772dd1c1b6c4db8259ecf8c90317dc848ff48e5a005dee72b2a15f4258b175b6
font_01_sfnt_off0001212e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212E 10816 bytes
SHA-256: 010760ad5394116f761d68323003267fc462acbe59278cb787a31d94f44cb5b5

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