Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fb538f1a88c9c4…

MALICIOUS

PDF

40.3 KB Created: 2020-06-01 16:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 0677357ea778980c810ed0a695790298 SHA-1: c996d184c4de68bfaea23dbd4b1a60aec86e3e1a SHA-256: 95fb538f1a88c9c4fed264a05c9abf2b79673c7014ba606a7585ea391272a091
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior. While no scripts were extracted, the presence of numerous unknown URLs suggests a delivery mechanism for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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.
  • 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 http://19e.undesirable.us/uploads/1/3/1/4/131438067/131438067.html#needle+felt+patterns+free PDF link annotation
    • http://peachmtngourmetgiftsconnection.com/uploads/1/3/0/5/130589049/soruvobup-zikewubar-jateva.pdfIn PDF document text
    • http://thessteam.net/uploads/1/3/1/1/131164112/xetobirerosefep_wenekusaborugu.pdfIn PDF document text
    • http://mail.maldonarchive.com/uploads/1/3/0/6/130620762/268770.pdfIn PDF document text
    • http://19e.undesirable.us/uploads/1/3/1/4/131438067/terms.htmlIn PDF document text
    • http://19e.undesirable.us/uploads/1/3/1/4/131438067/dmca.htmlIn PDF document text
    • http://19e.undesirable.us/uploads/1/3/1/4/131438067/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vitiwifapen.files.wordpress.com/2020/05/nakitaro.pdfIn PDF document text
    • https://nepigipoduge.files.wordpress.com/2020/05/sadiruvidijazudoweroti.pdfIn PDF document text
    • https://zibebuti.files.wordpress.com/2020/05/maxiledo.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 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000712f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712F 11056 bytes
SHA-256: b001e0434a100824acdd7b8ed05d2ded6d1a86a3fd05a9b57d03459f89405b9f

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