Malicious PDF — malware analysis report

Static analysis result for SHA-256 f960ad5dcbb25e4c…

MALICIOUS

PDF

42.7 KB Created: 2020-06-07 15:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 0276def68ad59b84cc64f91e6cf14cbd SHA-1: ff7a91e842aa754e9c5bdbbb058dabe4b09af562 SHA-256: f960ad5dcbb25e4c5d78a22dc2d826c68c93d62d1ee07ebfeccad0f3c8b6aa3d
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to domains that appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a deceptive or manipulative purpose. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://bfaog.com/uploads/1/3/0/5/130544703/130544703.html#witcher+elflerin+kan%25C4%25B1 PDF link annotation
    • http://foreverpetprints.com/uploads/1/3/0/7/130775361/fowidiwuzezamek_vatudi.pdfIn PDF document text
    • http://martinaforgeyauthor.com/uploads/1/3/0/6/130604733/8af0f9befa2.pdfIn PDF document text
    • http://379.undesirable.us/uploads/1/3/1/1/131164350/lejawigu.pdfIn PDF document text
    • http://oakislandhomeowners.org/uploads/1/3/0/4/130483194/7240588.pdfIn PDF document text
    • http://my.appleprint.co.uk/uploads/1/3/1/3/131379014/bc5ea32ef0ed.pdfIn PDF document text
    • http://freebies4baby.net/uploads/1/3/1/4/131452815/gabutipobawiwut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xiwixiligut.files.wordpress.com/2020/06/xilujuwatip.pdfIn PDF document text
    • https://toguzafozar975898281.files.wordpress.com/2020/06/88803419112.pdfIn PDF document text
    • https://zebutenot.files.wordpress.com/2020/06/sibisel.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_off00007683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7683 12636 bytes
SHA-256: fc7ab587a8da49643f7c0713f6e0a11366beecdb765563d2a804a7372651c07a

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