Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af319055455a4c9…

MALICIOUS

PDF

44.8 KB Created: 2020-03-15 08:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-10
MD5: 730e0eb9d10a04766ec6adb09b1df904 SHA-1: 4395e44a8d43f901b785701b1b439e26becd609d SHA-256: 1af319055455a4c96d8c7c3f89fe8df07e9fb3661cc679f0a9689a05fb48c8e1
96 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to other PDF documents hosted on various domains. The primary heuristic firing, PDF_SEO_LINK_FARM, indicates a large number of these external links, suggesting a coordinated effort to manipulate search engine results or distribute content across multiple sites. The embedded URLs point to domains that appear to be part of this link farm, likely serving as a distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://powerincreativity.net/uploads/1/3/0/5/130540397/130540397.html#washing+instruction+symbols+vector+free PDF link annotation
    • http://timelessfinds.net/uploads/1/3/0/6/130620778/9e44bb7013.pdfIn PDF document text
    • http://mathsgrant.com/uploads/1/3/0/7/130739558/2b7b1bea2c94333.pdfIn PDF document text
    • http://jasonsfictionshortstories.com/uploads/1/3/0/6/130621110/nejetusodawebafaxutu.pdfIn PDF document text
    • http://rpmanagementny.com/uploads/1/3/0/5/130588551/nagurogabinuto.pdfIn PDF document text
    • http://www.rjryanpartners.solutions/uploads/1/3/0/5/130544091/revemuxanukegirese.pdfIn PDF document text
    • http://server.dd-id.com/uploads/1/3/0/8/130874397/495304.pdfIn PDF document text
    • http://michellewellingtonphotography.com/uploads/1/3/0/7/130739648/kelef-sozonavofa-zodubutobeno-sonuwekapo.pdfIn PDF document text
    • http://losdoscomprades.com/uploads/1/3/0/2/130271087/14fadd8.pdfIn PDF document text
    • http://theroundtable.co/uploads/1/3/0/7/130739935/digavidavodujes-tugesav.pdfIn PDF document text
    • http://fintechinvestmentbanker.com/uploads/1/3/0/6/130622095/xividulenatuba_sujulofisadizi_pinopabidavab.pdfIn PDF document text
    • http://roseland-retreat.com/uploads/1/3/0/6/130603819/sigewijivir.pdfIn PDF document text
    • http://markdumstorf.com/uploads/1/3/0/4/130488839/wimisapedo.pdfIn PDF document text
    • http://company-of-things.com/uploads/1/3/0/5/130539344/6d5c2ff46353d0.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

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_off00007bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC8 8392 bytes
SHA-256: 5cad97a790f5c8d0549a76612ac649d469905976c783a1c5e96909fa997a7212
font_01_sfnt_off00009c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C44 2668 bytes
SHA-256: bb66d78edca8aa75a8db461931e44ad6eab12e4cd439df836d92d13c6ef6c22d

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