Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9bfbcc6cc531bd…

MALICIOUS

PDF

79.6 KB Created: 2020-12-25 02:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ad266ebe7fb8710f9595a40924f542c5 SHA-1: ef6540bd33b026f5a406d981096fee9ffc3c6cb6 SHA-256: fa9bfbcc6cc531bdc5b6b6ac4b837d184ce375be47c89761dc5e570a2ab95ab5
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/strik?utm_term=batman+superman+world%2527+s+finest+comic+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476123/normal_5fba74db13166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479236/normal_5fb2f1e51c522.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/majoratumapifen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454982/normal_5fa1eb3fe934f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485711/normal_5fb7be3a41e3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_5f9995e2d3abb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461786/normal_5fad2b8ed345e.pdfIn PDF document text
    • https://gefumugizifoz.weebly.com/uploads/1/3/0/7/130739155/fenitovebopa-xuxud-diwuseb-xusaxaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459058/normal_5fdbdafab4815.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://uploads.strikinglycdn.com/files/fd25db32-6d6a-401c-a8ed-f0d1c141ec48/can_dogs_eat_maple_syrup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09beb428-ffb7-4264-8311-5b43219e229b/43476955187.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_off0000ee11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE11 5360 bytes
SHA-256: 5a52e2d218cd24eff4eeccb2869dc68ca2bbd19e3bf0eef91d87c7d8cf4cb594
font_01_sfnt_off00010047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10047 10168 bytes
SHA-256: 0a3a9047efc560873605af3970beeff4fd20baa551a902e7887a879e83c56650
font_02_sfnt_off00012322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12322 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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