Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4fa47de245bc8e…

MALICIOUS

PDF

74.7 KB Created: 2020-12-26 22:52:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 04ced74228ab5b3219bb5fb7af363d48 SHA-1: 88770d6161c4c34f6884b2c961671375462449d1 SHA-256: 7e4fa47de245bc8eb15a7c96a663cea7823633651d87e77a4292e809f6e34a82
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of a URL with a 'utm_term' parameter related to document manipulation further indicates a phishing or social engineering attempt. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/aws?utm_term=insert+excel+sheet+into+word+doc PDF link annotation
    • https://tumebadov.weebly.com/uploads/1/3/4/8/134863232/dufebafejiwowemigir.pdfIn PDF document text
    • https://nupepapeziwib.weebly.com/uploads/1/3/5/3/135319604/sumokazala_bubeturekazotul_madilojuxome.pdfIn PDF document text
    • https://tuduzijusesuzi.weebly.com/uploads/1/3/1/4/131406801/00a2eed14e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_5fd661b49b015.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451375/normal_5fd056a26ffbe.pdfIn PDF document text
    • https://xidoxuzi.weebly.com/uploads/1/3/4/7/134707988/6102611.pdfIn PDF document text
    • https://pufoxufuzevelo.weebly.com/uploads/1/3/4/4/134486621/7314691.pdfIn PDF document text
    • https://cdn.sqhk.co/woledowo/jchcnjh/ev_connectors_coupon_code.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/iigC8jg/xesitetufebatifogapumu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487903/normal_5fc85ee1d627e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416140/normal_5f982243b6998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500453/normal_5fe617a928523.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478926/normal_5fdd72896b3ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zetubakuz/nividabotixiba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC84 4704 bytes
SHA-256: 06a708dc45004dea3b36cf2acdb2fef03f1e603168da1d069447a45eb72a652e
font_01_sfnt_off0000ec7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7B 10432 bytes
SHA-256: 31d2d85ba912cbcc01b95bf10aea1b965b16fbf94f333c64592933ca955c41e4
font_02_sfnt_off00011018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11018 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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