Malicious PDF — malware analysis report

Static analysis result for SHA-256 e620c295b81a74aa…

MALICIOUS

PDF

68.2 KB Created: 2020-11-10 05:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0350c2d64fc652e11dfc805c6d2a5be5 SHA-1: 74f74ec6cdec009be69f3b49c1991c0320a3bab4 SHA-256: e620c295b81a74aa341d3b9e409cd8fbb1fb20e583af06483ec1d9e18a710f88
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious or SEO-farmed content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or redirecting users to harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users by directing them to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?keyword=hirlinger+chevrolet+harrison+ohio+used+cars
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/42b6921045e4cc6.pdf
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/kujemodulo_pizab_livofutuke.pdf
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f903ba8aa008.pdf
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f9b9b16a2b93.pdf
    • https://cdn-cms.f-static.net/uploads/4391893/normal_5f909507360e6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/84042a63-6e7c-4b37-a498-1791a913b09a/how_does_alexa_work.pdf
    • https://s3.amazonaws.com/felasorarabipis/82355586355.pdf
    • https://uploads.strikinglycdn.com/files/e13ecb61-8af0-48c7-8a7b-2cd538933ec8/63629855538.pdf
    • https://uploads.strikinglycdn.com/files/c741b12a-46a1-4a02-9e64-786f330a4159/the_uncommon_leader.pdf
    • https://uploads.strikinglycdn.com/files/5b0f00c2-f08d-4dee-878c-b16c8f73a485/kadisejowanotogojul.pdf
    • https://s3.amazonaws.com/bokelur/cdc_opioid_conversion_chart.pdf
    • https://uploads.strikinglycdn.com/files/94389b02-a10b-45fe-b732-1fe39341292c/fisifodudodawamu.pdf
    • https://uploads.strikinglycdn.com/files/e2ff61e3-4388-4d7e-ad64-dab4937cf007/75733807576.pdf
    • https://uploads.strikinglycdn.com/files/64e62789-a6b7-4bdf-8f30-25729e603fd5/bowebepiwe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c95a.bin
06c16549e1852e83bb08d775950669dde9280a521f4a13382e3bfae63079ce6f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC95A 5220 bytes
font_01_sfnt_off0000db19.bin
554d5db9582abcdf7aac8bab92042c8be80d05144e91127c361a8bae020b14ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB19 11576 bytes