Malicious PDF — malware analysis report

Static analysis result for SHA-256 222f2abb37733213…

MALICIOUS

PDF

72.7 KB Created: 2020-03-22 11:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d2ce72d8129a024c85afd8ce037120dd SHA-1: bc2e5ab8961237c5a6a13e6033f8d88ee2ec3884 SHA-256: 222f2abb3773321321f0d6e350cd7c6c8b3818ac6f51362f9943673180ac7cb5
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains, indicating a link farm or SEO spam campaign. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. No scripts were extracted, limiting the analysis of direct malicious actions.

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://racingshoxsweden.com/uploads/1/3/0/4/130476499/130476499.html#freeki+games+educational+trivia+answers
    • http://rosetintedmama.com/uploads/1/3/1/0/131070207/zixoti.pdf
    • http://jobs-inside.com/uploads/1/3/0/7/130739265/26ed556c7a9.pdf
    • http://mx.vallodidiano.org/uploads/1/3/0/6/130621483/597f7852be3.pdf
    • http://www.metropolismexican-grill.com/uploads/1/3/0/6/130604088/dosurofoxubif.pdf
    • http://webmail.cpnm.ca/uploads/1/3/0/2/130292098/ralamoxetupepux-mesuxebusowerat.pdf
    • http://gabrielkane.com/uploads/1/3/0/8/130813785/sijemulujumoko_simaxakagig_zukulude_revofopa.pdf
    • http://theotherevilsister.com/uploads/1/3/0/6/130621483/zubaxatatarol_wuzenifedikojib_wegopu.pdf
    • http://www.qualityinn-sa.com/uploads/1/3/0/5/130550925/bamulubomepabuwemavo.pdf
    • http://batistabakery.com/uploads/1/3/0/2/130272892/8e4a8f2c.pdf
    • http://www.tablesquad.com/uploads/1/3/0/6/130605069/046e55dd0d8a60.pdf
    • http://sherfco.com/uploads/1/3/0/5/130588256/814d7a59572.pdf
    • http://asimpleido.net/uploads/1/3/0/5/130551248/rewuzubotejizupujela.pdf
    • http://topggfashion.com/uploads/1/3/0/5/130540504/13d343e8c3537.pdf
    • http://www.spoonpoint.com/uploads/1/3/0/6/130621196/4664030d877d2.pdf
    • http://proedge406.com/uploads/1/3/0/7/130775879/8290231.pdf
    • http://karenhillock.com/uploads/1/3/0/2/130289214/wokibodogal_gevepapemumare_pasupewiforemo.pdf
    • http://delatexspuiters.nl/uploads/1/3/0/2/130272361/tugex.pdf
    • http://clarepaniccia.com/uploads/1/3/0/5/130589072/037cae6.pdf
    • http://preventitall.com/uploads/1/3/0/5/130589431/joxifefa.pdf
    • http://forgetmenotboxes.com/uploads/1/3/0/7/130739381/e2d3336e9.pdf
    • http://the-cpr.com/uploads/1/3/0/6/130639882/bitot_kevabozomafuka_xoniv_ripokibar.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_off0000f45b.bin
ff0eb6c73de9c314aa49331f743525a04238399d9ae3a5d2839e40712238a44a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF45B 8508 bytes

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