Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf547939c710a6b3…

MALICIOUS

PDF

68.2 KB Created: 2020-12-18 10:59:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f4d808d8180ad7da4527caf697cdc66c SHA-1: c2efa5a39e91c76265b7798110917934e85bf92f SHA-256: bf547939c710a6b34b3b041303d0818919eaee0e37629e7a32447113392244f7
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://trafficel.ru/strik?utm_term=netgear+cg3000dcr+user+manual PDF link annotation
    • https://xexiwimelogodit.weebly.com/uploads/1/3/4/5/134593193/ziginodoku_jelewinomisek_kodoxab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_5f90bd68d9f8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5fa2b563dbade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_5f96375a7d5e6.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/buwozometev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422382/normal_5fd1b50f6e34e.pdfIn PDF document text
    • https://vakigosem.weebly.com/uploads/1/3/4/4/134480352/0af54fb2f61c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_5fb0047e09e01.pdfIn PDF document text
    • https://fimuvuxufubewi.weebly.com/uploads/1/3/4/4/134442536/wiloxeragizik-monaguper-vononunetuje-vutiguwobonu.pdfIn PDF document text
    • https://sopoxovolofu.weebly.com/uploads/1/3/4/5/134509961/536f0f8930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5fb2d19945916.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470835/normal_5fc92db4578bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f1cfda-dd4c-4fff-a886-6a80d7f28508/26504322192.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/baby_sleeping_bag_2._5_tog_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b392530c-9979-4d58-8fbe-4f4feb9040cb/19085902223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae967fdd-e140-4294-b070-dc2e38a5a974/41383850045.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEF 5536 bytes
SHA-256: 27402aafc02d5ea82e85a8290452a115a4a6182dbea291aa8792fd260a2bb5dd
font_01_sfnt_off0000e0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AB 10148 bytes
SHA-256: 48f643079f8738968bc392e7dea2307f9c9688671c73f02dcbfd98663a2d2489

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