Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd7b8c2fb4fd473…

MALICIOUS

PDF

43.1 KB Created: 2020-05-16 13:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90b1d766fc793982150ce9609ab551ff SHA-1: deb410cbd6495315258106e31a3230ffb4129920 SHA-256: 6dd7b8c2fb4fd47348fc8e50410090ee08bc0c5f4abb2d11ffebbda41ac316c3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and URLs, suggesting an attempt to disguise the true nature of the links, which likely lead to malicious content or phishing pages.

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://khpottery.com/uploads/1/3/1/4/131406263/131406263.html#vmware+workstation+player+old+version
    • http://happygamesorg.com/uploads/1/3/1/3/131380848/rubejim.pdf
    • http://losgatosswingband.com/uploads/1/3/0/4/130435518/4653fcb4.pdf
    • http://spiritlawyer.com/uploads/1/3/1/3/131384380/4847960.pdf
    • http://videoprofesionalcr.com/uploads/1/3/1/4/131453965/vuxutujulenazexagiji.pdf
    • http://laurenjernigan.com/uploads/1/3/0/6/130620532/a35fcf2.pdf
    • http://mrscastilloperez.com/uploads/1/3/0/8/130874533/5944765.pdf
    • http://oncitynow.com/uploads/1/3/0/2/130272071/nejilufuwex.pdf
    • http://mahaservice.net/uploads/1/3/1/4/131438259/5031351.pdf
    • http://fortkortlaw.com/uploads/1/3/0/8/130813447/wanabepoberigu.pdf
    • http://mlloydhedel.com/uploads/1/3/0/4/130476277/95f1bfe7563b0f.pdf
    • http://larksmessage.com/uploads/1/3/0/4/130478314/6859500.pdf
    • http://dumbenergydepot.com/uploads/1/3/0/5/130539881/tadux-wuwunodalitit.pdf
    • http://buyfrontlinegold.com/uploads/1/3/0/4/130483825/eeb4e01f72d9f.pdf
    • http://divinedesignaz.com/uploads/1/3/1/3/131397930/lopuxigid.pdf
    • http://therealityexperiments.com/uploads/1/3/1/4/131408572/kurofesegak.pdf
    • http://guardianprep.com/uploads/1/3/0/6/130621315/tisutapolu.pdf
    • http://littlelennisboutique.shop/uploads/1/3/1/3/131397970/cd54f36051565b6.pdf
    • http://rdhaasco.com/uploads/1/3/1/8/131871993/37a820ab5b.pdf
    • http://mycloset2yours.shop/uploads/1/3/1/4/131406520/fulorelov_panekipuwa_letozewadusek_xewaximavodawid.pdf
    • http://49kearny.com/uploads/1/3/0/6/130639764/8997400.pdf
    • http://killaclowns.com/uploads/1/3/0/7/130776169/gevilod.pdf
    • http://marylandfarmstx.com/uploads/1/3/0/2/130272282/dc3b406.pdf
    • http://tnknutson.com/uploads/1/3/0/6/130622077/sefazek_kumavimerigo_wevowixepu_sipage.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bfb.bin
a31fd7a023c8706b61a8fc8ad0b43a8539c2a451944fea27d5b46931a8ca5b5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFB 10588 bytes

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