Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe737b4639e26711…

MALICIOUS

PDF

44.6 KB Created: 2020-04-11 07:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: b32dc37b752844cc4ea59acaf12f24d0 SHA-1: 9fc8d3f47c19a10c97519d7f449cbf28a30e3972 SHA-256: fe737b4639e26711532cf740ea986f1dad2e941a6b87458f145dc3a33ee96080
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files on unrelated domains, suggesting a link farm for SEO manipulation or malware distribution. One prominent link directs to a page with 'age of empires mobile apk' in the URL, indicating a lure for users seeking game-related content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://adsl-63-204-18-59.benefitplans.org/uploads/1/3/1/6/131636908/131636908.html#age+of+empires+mobile+apk PDF link annotation
    • http://marphotography.net/uploads/1/3/0/5/130590295/pokedunapo.pdfIn PDF document text
    • http://purrsonalspacekittylounge.com/uploads/1/3/0/6/130603721/9334100.pdfIn PDF document text
    • http://borrowingmoments.com/uploads/1/3/0/2/130291551/pomopa.pdfIn PDF document text
    • http://makermark.com.au/uploads/1/3/0/4/130435803/bedumabe.pdfIn PDF document text
    • http://vitalogybiotechsolutions.com/uploads/1/3/0/5/130543552/6d3e0bf05.pdfIn PDF document text
    • http://druecrookston.com/uploads/1/3/0/7/130775172/jawaziga-wetakan-febediva.pdfIn PDF document text
    • http://maritimeclothingcompany.com/uploads/1/3/1/3/131397964/nasejetuvow.pdfIn PDF document text
    • http://mountainvalleydistrict-montanacouncil.com/uploads/1/3/0/2/130272606/vefokam-gobuzawufataveg-paxut.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

Related samples 8

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_off0000891f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x891F 7768 bytes
SHA-256: a3953249c886b27acdeba39779c7114802e174700ff7fd4d2ba298fd8881e8ae

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