Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1601dcc298e7da…

MALICIOUS

PDF

53.9 KB Created: 2020-04-04 12:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 6de775d039c9f64be99ccc605210c916 SHA-1: 9a066d0572f28ca8ce9b7ff6cfbe15598e61f5d4 SHA-256: 3d1601dcc298e7dae93511922c098c6b67a0236c50a8c64129a3b19248e88381
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This suggests a link farm or SEO poisoning tactic designed to drive traffic to potentially malicious content. The document body is heavily obfuscated and contains embedded URLs that are part of this link farm. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://thecandicerose.com/uploads/1/3/0/5/130551656/130551656.html#concepto+de+orientaci%C3%B3n+vocacional+pdf PDF link annotation
    • http://boulderfamdinner.com/uploads/1/3/1/4/131406931/digixudokax-juvonigubaxa-migevapubugupat.pdfIn PDF document text
    • http://wiseway.ee/uploads/1/3/0/5/130539107/nigafavaruv.pdfIn PDF document text
    • http://doghousebnb.com/uploads/1/3/0/4/130483647/16e6b144.pdfIn PDF document text
    • http://maritimeinsurancebroker.net/uploads/1/3/0/5/130543154/merusenowowo.pdfIn PDF document text
    • http://vartspace.org/uploads/1/3/0/6/130639884/vomenej-paxoxodexam-neroviraxumalo-joriwid.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: beebrave.pink 12 samples

Related samples 3

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_off000095c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95C9 7496 bytes
SHA-256: 5a20a5aa13b9e425d973e7d301b182c98cdef1e2e64cb5a5ee9a0a2def38f203
font_01_sfnt_off0000b2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DA 16232 bytes
SHA-256: 313ae97aba67c0290f1f3f711cce73b58f529e1044d09d56103cb5e1641d71c0

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