Malicious PDF — malware analysis report

Static analysis result for SHA-256 d374b21fc804dd0b…

MALICIOUS

PDF

36.1 KB Created: 2020-03-09 03:50:40 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 310636a0f3e9ee6ab831874b77308367 SHA-1: e731765046fd4080e135048f10b92dfec8deac05 SHA-256: d374b21fc804dd0b403fc944c892ace4659ec670abc5cc116dc8859a5e0e188e
94 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier. It contains a large number of external links, many of which point to similarly structured URLs on different domains, suggesting a link farm or SEO abuse tactic. The primary URL points to a page discussing 'ethanoic acid ethanol equation', likely a lure to disguise the malicious intent. The file's structure and the presence of numerous outbound links indicate a likely attempt to redirect users to malicious content or phishing sites.

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://trikon-group.devsite-1.com/uploads/1/3/0/7/130775927/130775927.html#ethanoic+acid+++ethanol+equation
    • http://northpolestroll.com/uploads/1/3/0/8/130814241/89f70a387ea6.pdf
    • http://trustedadvocates.org/uploads/1/3/0/7/130776166/rizanijofujak_totugani_banasekojoze.pdf
    • http://www.cindyageorgetreasurer.com/uploads/1/3/0/3/130312912/fexorarud-foliladibu-pabuzejijitadik.pdf
    • http://marcalodrywalltapingpainting.com/uploads/1/3/0/4/130490786/1b8ab54089b2ad.pdf
    • http://www.account-amzbilling.com/uploads/1/3/0/2/130288626/c5cbc9b7.pdf
    • http://hausofmeow.com/uploads/1/3/0/6/130622048/d5cd634e.pdf
    • http://mylegalwebservices.com/uploads/1/3/0/5/130539109/biwusizisebonoz.pdf
    • http://www.fmg-goldau.ch/uploads/1/3/0/8/130873771/21228.pdf
    • http://kimcopywriting.com/uploads/1/3/0/5/130540397/filowojejobixodu.pdf
    • http://cascadia.life/uploads/1/3/0/5/130541552/b4a061f3fc7550.pdf
    • http://www.espinosadelosmonteros.com.mx/uploads/1/3/0/6/130620557/tifur.pdf
    • http://tanyardgolfcourse.com/uploads/1/3/0/8/130813054/tunazogaxubof.pdf
    • http://getneckhammock.net/uploads/1/3/0/6/130604317/sonomunixivo_nabes_zujesi_zajutere.pdf
    • http://lahomesrealtor.com/uploads/1/3/0/5/130588574/gozikesotare.pdf
    • http://smithpropertydevelopment.com/uploads/1/3/0/8/130873771/xipidaj.pdf
    • http://autodiscover.houseofdiamondsart.com/uploads/1/3/0/4/130491513/9533874.pdf
    • http://pawleysislandwelcomecenter.com/uploads/1/3/0/2/130291624/f50ae49.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_off000064a5.bin
47bfd6ac11d7b80cefdb19272a016138db93c73fc24c6370eaa91f30fd4565da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A5 7768 bytes

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