Malicious PDF — malware analysis report

Static analysis result for SHA-256 7795e2ca2ea49b3a…

MALICIOUS

PDF

69.6 KB Created: 2020-12-14 08:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e609f33e7f9425f66c2a6464076f56c9 SHA-1: e02408c50f51624714b8e848432a8b2a171551a7 SHA-256: 7795e2ca2ea49b3a4f4b6f8fc1ef286dc8e626162d2a5171d684cbb760876429
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of linked PDFs.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=pathfinder+spider+climb+slippers In PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/1720788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_5fd6b13fcce3a.pdfIn PDF document text
    • https://webuwoterin.weebly.com/uploads/1/3/4/5/134589655/2591253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_5f9507dc81af0.pdfIn PDF document text
    • https://fipowawebes.weebly.com/uploads/1/3/4/6/134601566/c8fc79de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409243/normal_5fbb7d9c1880a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc7998c717a0f60c4044aef/t/5fd65565df2f0204c234b12e/1607882085937/naforuvazipoku.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b8130a2757459b03e463/t/5fca534e7612084f2dbbac69/1607095120078/car_drivers_online_fun_city.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3046cc14dfd36feff55ec/t/5fcefc9214319a51dc26aad8/1607400594449/bivul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7baff10d6a92a736dfd41/t/5fcf2c6d05f6f2780754535d/1607412846553/all_recipes_silicone_baking_mat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50ae4a13a450bab0f051b/t/5fc6b9eb93ad1a4812031b5d/1606859244202/ziguvokupidudovoxodeg.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_off0000d29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29B 5536 bytes
SHA-256: 6a4d7c185f204b25d09171c1d5aece33f6f378770aa74e39b357937236533b9a
font_01_sfnt_off0000e53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53F 10692 bytes
SHA-256: 7b1d68610b418766900bfc89355a50b6b82bad5d0bce2d164c29bcf2295c4a86

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