Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15a95dd791eaa32…

MALICIOUS

PDF

36.2 KB Created: 2020-05-18 09:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 85353fd284ad74e366a36434b338a474 SHA-1: 7b905060b1aac2c66883dee2d51a54980d355807 SHA-256: b15a95dd791eaa32df268562a47ade87dea017601cb5f6adf75177b522dc7d57
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on various domains. This indicates a link farm or redirection scheme designed to lead users to potentially malicious content. The document body text, though partially corrupted, includes the phrase 'Aloha risk software free', suggesting a deceptive lure. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://dmscodes.com/uploads/1/3/0/5/130550968/130550968.html#aloha+risk+software+free PDF link annotation
    • http://be-stronglikebull.com/uploads/1/3/0/6/130605175/74ebb4a1fac.pdfIn PDF document text
    • http://candaceisaacs.com/uploads/1/3/1/8/131856109/696644332acafbf.pdfIn PDF document text
    • http://mikewhitetennisacademy.com/uploads/1/3/0/5/130550783/70fb3.pdfIn PDF document text
    • http://coloradodachtoberfest.com/uploads/1/3/0/5/130545954/6992691.pdfIn PDF document text
    • http://kunselmanelectricinc.com/uploads/1/3/0/8/130814845/jixusese_kunaduwuv_janovadamu_zosogosaxifit.pdfIn PDF document text
    • http://getitrevamped.com/uploads/1/3/0/6/130639077/5289741.pdfIn PDF document text
    • http://orangesfrommorgan.net/uploads/1/3/0/8/130814283/kipowonudewux.pdfIn PDF document text
    • http://codynaz.com/uploads/1/3/0/4/130483413/6973627.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAE 11188 bytes
SHA-256: 08f337eab977ad63530f04600ac0e08a7c6652ebc8bda3524f51d5634dd39ae4

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