Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d479341b4bbf90…

MALICIOUS

PDF

41.6 KB Created: 2020-03-28 09:15:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 39ef8bbf38f7d92ed8c8f6862de685d1 SHA-1: eed0f77ade7e7863a44a34ac55c210a34fbf6c37 SHA-256: a2d479341b4bbf908c9c8bdff6d8f2003ccfa4537d684d6bbdd75f8ab514a79d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body text, though partially corrupted, includes the phrase "2015 tacoma owners manual pdf", which is likely a lure to entice users to click on the embedded malicious URLs. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://pragueprivatetransfers.com/uploads/1/3/0/4/130483924/130483924.html#2015+tacoma+owners+manual+pdf
    • http://remote.enterprise-group.co.uk/uploads/1/3/0/6/130603698/3014808.pdf
    • http://alevelphysicsrevision.com/uploads/1/3/0/4/130488834/xajosefevedaluf.pdf
    • http://marcusphotography.net/uploads/1/3/0/3/130313035/disirebeki.pdf
    • http://medicaleducationupdate.net/uploads/1/3/0/6/130620632/zeviritojuxapi_padakixepexarom_junenarebitog.pdf
    • http://www.aeronave.com.br/uploads/1/3/0/6/130621501/nulobugomapeb_jemitunaj_seratasumukive_lepodonaveso.pdf
    • http://ritmischgym.com/uploads/1/3/0/2/130287808/jijojafoxut.pdf
    • http://separateclothing.com/uploads/1/3/0/3/130313555/vever-xomonew-gaweninaxopuni-soxos.pdf
    • http://fortiswindenergy.dadgifts.us/uploads/1/3/0/4/130488338/2735118.pdf
    • http://jasonduty.com/uploads/1/3/0/4/130483474/lajenadonozijav.pdf
    • http://worknparty.com/uploads/1/3/1/0/131070656/pinilis.pdf
    • http://corretorjclaudioimoveis.com/uploads/1/3/0/4/130488750/xarenavugifozedate.pdf
    • http://ceadethiopia.com/uploads/1/3/0/5/130540493/2189230.pdf
    • http://thenewdope.com/uploads/1/3/0/4/130436426/wawekibebezodaxidira.pdf
    • http://northwestpolebuildings.com/uploads/1/3/0/6/130621706/452302e89b6.pdf
    • http://wrapswithatwist.com/uploads/1/3/0/3/130323161/3149657.pdf
    • http://setfreeindeed.com/uploads/1/3/0/7/130739061/3979845.pdf
    • http://tertiarypublications.com/uploads/1/3/0/8/130814652/1ffb534b732.pdf
    • http://jonijohnston.com/uploads/1/3/0/4/130435680/5019287.pdf
    • http://heavenlyhappyhandyman.com/uploads/1/3/0/9/130969405/3407b5cb3bacdd.pdf
    • http://freeconsultationandquote.com/uploads/1/3/0/6/130621058/175753.pdf
    • http://edtechrevolution.com/uploads/1/3/0/5/130550986/zusowoxifo_giduporepot_vuluwegeniduf.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_off0000795e.bin
ce8ad7d771eb17f0a96de5e2f7acf3f55da9aec35a2a04fb939847e721012ffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795E 8048 bytes

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