Malicious PDF — malware analysis report

Static analysis result for SHA-256 710c6a9bb46944d3…

MALICIOUS

PDF

68.7 KB Created: 2021-02-12 16:32:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fa594f528ce5b9727551945175f53043 SHA-1: f54fc3e2d87ff4d02e858d5a11b96d424bddab99 SHA-256: 710c6a9bb46944d3d71dbef56dd77c9f38a2a14371a93fcd3f6117632b107969
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://baarspo.ru/wix?keyword=sony+3lcd+wega+engine+tv+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4505820/normal_601faf207a077.pdfIn PDF document text
    • https://laziboxejebemu.weebly.com/uploads/1/3/0/7/130740401/0c76ebeaf20.pdfIn PDF document text
    • https://xilamexazoleguj.weebly.com/uploads/1/3/2/6/132695560/99151.pdfIn PDF document text
    • http://gallery-shop.site/sobare20wop.pdfIn PDF document text
    • http://cybety.xyz/schema_electrique_logiciel_macxonpn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_600ca4a6600fd.pdfIn PDF document text
    • http://betmoy57.com/encyclopedia_of_christian_apologeticslyav4.pdfIn PDF document text
    • http://smotrikino.fun/norividumetibifoduduvh9n6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451754/normal_5fd7c066ba381.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476767/normal_60050ccd5d459.pdfIn PDF document text
    • http://4d-5d.com/dobenepigumiwu57xkx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_602562aec8fd9.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/gidibesuxi/wugebalegekevi.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/rokaxakobob.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/anjali_anjali_pushpanjali_video_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/b._c._a_course_information_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/37833896696.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_off0000cfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBA 5508 bytes
SHA-256: 1dfe955a8dbc3555d3e0e5ac92cab30cacfa92338260e0d364ac5b238c5cc38b
font_01_sfnt_off0000e288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE288 10320 bytes
SHA-256: d8ffe5f7a07a4db2ae53dfe2b925b90cc112a6f8680f30edd94b8edfe923bdd1

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