Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f106a3e423c6e2f…

MALICIOUS

PDF

64.3 KB Created: 2020-12-11 09:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: cb69d5045ba47eedfb4e36bf253afe51 SHA-1: 93831cd9707ae5481a275b66f885e4be379acaed SHA-256: 7f106a3e423c6e2f38608cd5202513e72e7889c731f4317fffe59795823c5742
186 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 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://traffnew.ru/strik?utm_term=bismarck+public+schools+supply+list PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408324/normal_5fc56e4b8778a.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/8636814.pdfIn PDF document text
    • https://diwopasod.weebly.com/uploads/1/3/4/4/134475510/4261733.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/nakuwureguwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378604/normal_5fce946258099.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476767/normal_5fc4b235d2610.pdfIn PDF document text
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/9958184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_5fd2d2e42425d.pdfIn PDF document text
    • https://mivetemadika.weebly.com/uploads/1/3/4/4/134471856/bd0a9d8a5e23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451230/normal_5fb6ae614ed8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495999/normal_5fb6cb27efc3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496811/normal_5fb2a9125d3ef.pdfIn PDF document text
    • https://vexakoloninabi.weebly.com/uploads/1/3/4/8/134851928/94c2ccea4.pdfIn PDF document text
    • https://satiwumufov.weebly.com/uploads/1/3/4/7/134724604/dudilalulu-ruxexenub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426556/normal_5f9cbcd441c40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f970c97291d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5f92d4936771e.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
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D1 5188 bytes
SHA-256: bc3146a9202eb4c61c9ce4cb190a614c53506ffb044af3125d54d4f606bf0155
font_01_sfnt_off0000c36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC36C 9956 bytes
SHA-256: 0d9032d2bee4d1d46ae48ec50703d51d6ed2ad2eec46d57c2a9eeca090265ab1
font_02_sfnt_off0000e579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE579 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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