Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8215f3c966ac7a2…

MALICIOUS

PDF

118.4 KB Created: 2021-06-05 13:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 77c606e48ba69f33a9be446cc7af1712 SHA-1: b3799f17bc9b18f54ab01b72d375e513aa489669 SHA-256: f8215f3c966ac7a288e01bf0e634c142e46acc39d57c15434809a600d7c3907b
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 0.9989

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://golowaki.ru/123?utm_term=insert+image+to+google+sheets PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467586/normal_5fe58c0b6e4f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5fd0dbcc47265.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497095/normal_5feb94ed1e90a.pdfIn PDF document text
    • https://vuzodafolo.weebly.com/uploads/1/3/4/7/134732359/5fa4824c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_60316093bac1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500883/normal_6001a50a71b14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443578/normal_5fd06190e1d83.pdfIn PDF document text
    • https://towoxaji.weebly.com/uploads/1/3/0/7/130740158/dovod_xozunej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414153/normal_5fcb2f8c38c95.pdfIn PDF document text
    • https://kuwumezebuxe.weebly.com/uploads/1/3/4/1/134131528/815ffb7066f207f.pdfIn PDF document text
    • https://gumomerad.weebly.com/uploads/1/3/1/8/131856086/guxogimanu_widozikozidafa_mewijegovude_fidesupubek.pdfIn PDF document text
    • https://nudikiwo.weebly.com/uploads/1/3/4/0/134042489/7270562.pdfIn PDF document text
    • https://zagefejov.weebly.com/uploads/1/3/2/7/132710748/levamekogilufofafi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382621/normal_5ff9b3176e099.pdfIn PDF document text
    • https://fabimevedojepa.weebly.com/uploads/1/3/4/6/134678150/d27ed7.pdfIn PDF document text
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/2548330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_5fd796ec6316b.pdfIn PDF document text
    • https://bufodenoziro.weebly.com/uploads/1/3/4/5/134585066/jodenoduvejobejawef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464080/normal_60512a624d963.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mutatalibo.pbworks.com/f/marketing_an_introduction_13th_edition_reddit.pdfIn PDF document text
    • http://xuwajesorewo.pbworks.com/w/file/fetch/144643290/autotrader_classic_ford_trucks.pdfIn PDF document text
    • http://pebegijopolo.pbworks.com/f/dizisosux.pdfIn PDF document text
    • http://wixugigir.pbworks.com/f/animated_text_after_effects_template_free.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_off0001919f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1919F 5036 bytes
SHA-256: 7faceeb367c8447d0e73d94f6e18f2a2df7b51da9b0397765c77288f5ead1565
font_01_sfnt_off0001a28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A28D 11984 bytes
SHA-256: fb414d88aeff7fb0f8453724f1b865de638682ef90b4f770ef8802336e12dbf2

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