Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce534c611ea1a422…

MALICIOUS

PDF

76.4 KB Created: 2020-11-10 16:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7ae008a84228e9ab69ea47433c8fbcd1 SHA-1: 9d306788973b2fd7aef7e582e2cc891de62c7ec4 SHA-256: ce534c611ea1a422c3313a10430d32e9cfc9bce6ec7ef2908cf33703a0e0384d
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-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://trafficel.ru/123?keyword=demonstrative+speech+draft PDF link annotation
    • https://zitidatuviwe.weebly.com/uploads/1/3/4/4/134493200/e112e4c9bd1704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454052/normal_5fa9d6b78229c.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/dafuvenowunisig-terugepokibo-netov-dupuvopavukiv.pdfIn PDF document text
    • https://nakefofomiruni.weebly.com/uploads/1/3/4/4/134483242/2578326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393348/normal_5f8e6c121bcd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f9fdbcd831ea.pdfIn PDF document text
    • https://zuxuzesis.weebly.com/uploads/1/3/1/4/131438019/9767322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f895e88ae0f0.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/f33ade76.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/265bdd54fd.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/wovitiku/zoe_bray_cotton_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/xebareto/1994_range_rover_country.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/teladuva.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/morapadejazisibilutaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/fowuwuwavugajum.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_off0000eeb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB4 5424 bytes
SHA-256: b08cb4d461a5328b779d9b694483ba46a478ec2b4ca543f495fa85c0fe052d9c
font_01_sfnt_off00010107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10107 10644 bytes
SHA-256: 2f33172bba04b2d7feae929e9241d9ba1f1a051e6943006b5e93db65be5aafc1

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