Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dec586406bd266c…

MALICIOUS

PDF

75.2 KB Created: 2021-01-27 04:56:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e6de6a48a11c3bfda9cb48f9e527966e SHA-1: 184d52e3648fc97cac5a33202d595bbd935ab937 SHA-256: 7dec586406bd266c3874e78f2edb2ea384baac89c044881db79ce0fafced6343
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm PDF. It contains numerous external links to other PDF files hosted on various domains, suggesting a distribution mechanism for phishing or malware. The document body, though heavily obfuscated, appears to be a lure related to 'Easton aluminum arrow selection chart'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://seumenha.ru/123?utm_term=easton+aluminum+arrow+selection+chart PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427519/normal_5feb7f4f81c85.pdfIn PDF document text
    • http://pixxel.life/65442731176zapbq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417535/normal_5fd64c515659d.pdfIn PDF document text
    • https://rusijarumeza.weebly.com/uploads/1/3/1/8/131871651/3e8f6f.pdfIn PDF document text
    • https://niwarixetawozav.weebly.com/uploads/1/3/4/1/134108921/kawipekidefur-bibumat-vobizikizimi-vufijuvejulasi.pdfIn PDF document text
    • http://xtw2.club/jomudovuzonofazadurowamo8cln.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459060/normal_5ff60e72be2bd.pdfIn PDF document text
    • http://workbykoder.xyz/divofudukawozipetedzras4.pdfIn PDF document text
    • http://lavka-karamel.ru/13558519612be49s.pdfIn PDF document text
    • https://lafazomutege.weebly.com/uploads/1/3/0/7/130740298/9af6b2be1844.pdfIn PDF document text
    • http://steelsho1.club/wiramegenusopakelodezd9l6.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/797932.pdfIn PDF document text
    • https://pejeronasoko.weebly.com/uploads/1/3/2/6/132682646/3c7e0e9d583fa66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_6007dd99b80ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369504/normal_5fd08864bab0e.pdfIn PDF document text
    • http://distornyup.site/ragalusisuzowigatalelajaj3y26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C4 5088 bytes
SHA-256: 9af468bf153f53383053fd4db52714e5acc5071b14df996e06dbd7342f334e17
font_01_sfnt_off0000f8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F7 11252 bytes
SHA-256: 0b7147de5f754a9c4580d54693c4c5a3f97f4e102e21d54aa6e9e8c714fad3a7

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