Malicious PDF — malware analysis report

Static analysis result for SHA-256 0911c6ff699e05bf…

MALICIOUS

PDF

42.1 KB Created: 2020-04-01 23:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 691055686ba7472a8a6c57af4533dfef SHA-1: a254ebc01c85f6169c1aa9eecc86c70b757205ef SHA-256: 0911c6ff699e05bfa940c207678423323e51e0f1ca3aa0fe3e84c82b72651a59
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, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. While no scripts were directly extracted, the embedded URLs are the primary indicators of malicious intent, likely serving as a distribution point for further compromise.

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://twelvita.com/uploads/1/3/0/5/130551589/130551589.html#check+vsc+lexus+es+350
    • http://positivepsychservices.com/uploads/1/3/1/0/131070375/7182039.pdf
    • http://strategicimpactconsulting.net/uploads/1/3/0/5/130539350/2791275.pdf
    • http://veronicasandall.com/uploads/1/3/0/3/130312944/677262.pdf
    • http://reefmiami.com/uploads/1/3/0/6/130620348/wutesanuvi_wopajozonipan_nawuxel_kudot.pdf
    • http://isaaccorella.com/uploads/1/3/0/2/130287960/ledozunawoxevup_bejejexumamu.pdf
    • http://vintagecharmphotography.com/uploads/1/3/0/4/130483728/poguk_saniwe.pdf
    • http://bacmed.net/uploads/1/3/0/6/130640095/8942157.pdf
    • http://thequarterbackclubofrva.org/uploads/1/3/0/5/130544090/kenopefusi.pdf
    • http://paradisecream.ca/uploads/1/3/1/0/131070167/d6b3b08.pdf
    • http://422303300893226265.com/uploads/1/3/0/4/130483923/jitunimudatotum.pdf
    • http://aikenequestrianproperty.com/uploads/1/3/0/8/130814298/negamepuvixolofefexu.pdf
    • http://seatfm.com/uploads/1/3/0/9/130968915/lubixipajewofivesene.pdf
    • http://theconsciousseed.org/uploads/1/3/0/3/130379150/muwoja.pdf
    • http://wearyourcrownqueens.com/uploads/1/3/0/6/130621714/rapoderenova.pdf
    • http://infiunit.com/uploads/1/3/0/6/130621279/zujixewuk_wamuroxage_nadusegivow.pdf
    • http://bridesewbeautiful.org/uploads/1/3/0/9/130969829/wamenekifaba-pifivilodumukad-bijapifuvubi.pdf
    • http://azrahealing.com/uploads/1/3/0/7/130738623/pinetumanatelunevon.pdf
    • http://njetd.com/uploads/1/3/0/6/130640199/kobevemonuwom_nexuwilukinap_ripod_pariberisatuper.pdf
    • http://partyplus613.ca/uploads/1/3/1/1/131164504/5d66441d3ea.pdf
    • http://xodessertsandbakery.com/uploads/1/3/0/4/130476940/gibiv-jasexokelebon-rofin-gidenerivi.pdf
    • http://threadsbynef.com/uploads/1/3/0/2/130291662/sugowetitiguw.pdf
    • http://ziontestsite91.com/uploads/1/3/0/7/130739460/7296315.pdf
    • http://robinyu.com/uploads/1/3/0/3/130323635/pugab.pdf
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d6c.bin
f823e15411694014d970f19e6da6cbb5ed529b59356b2a21309abd8317773950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6C 7508 bytes

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