Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bfc71b173971842…

MALICIOUS

PDF

46.3 KB Created: 2020-03-10 11:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2b51e51fa80071cb9f690a9e1d43bcb2 SHA-1: 4cd96824c6c7c060fa7cfa1b14641b5749f8e2c8 SHA-256: 9bfc71b17397184239ac53463f9e620d2f8d015af4a1fb60304b8c7986a2b3cd
116 Risk Score

Malware Insights

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

The PDF document is identified as malicious by an ML classifier and exhibits characteristics of a phishing lure, including being image-only with a click-outward action. The document body contains a reference to 'Ohaus explorer pro service manual', likely a pretext to entice users to click on one of the numerous embedded URLs. These URLs, such as http://k0i49.salon225.com/uploads/1/3/1/1/131164322/131164322.html, are likely part of a link farm designed to redirect users to malicious content or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 46 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://k0i49.salon225.com/uploads/1/3/1/1/131164322/131164322.html#ohaus+explorer+pro+service+manual
    • http://highdesertinventmentsbendllc.com/uploads/1/3/0/5/130588299/dujarabowupinonasu.pdf
    • http://ingridcooper.com/uploads/1/3/0/5/130546804/125984.pdf
    • http://www.hwl-mfg.com/uploads/1/3/0/2/130291827/dcc980d6047b.pdf
    • http://mail.yungthach.com/uploads/1/3/0/6/130621383/najirumelalenigugofu.pdf
    • http://epsaofficial.eu/uploads/1/3/0/3/130323597/123781abfe4f97.pdf
    • http://mta-sts.mx.heatherwittmezzo.com/uploads/1/3/0/7/130738646/4231905.pdf
    • http://apologiesfrommen.com/uploads/1/3/0/6/130621918/robobibu.pdf
    • http://ravenheim.net/uploads/1/3/0/7/130739654/7019413.pdf
    • http://up2codeinc.com/uploads/1/3/0/3/130313235/9593418.pdf
    • http://www.thesagaciousone.com/uploads/1/3/0/9/130969744/a97e3.pdf
    • http://www.coreconsulting.com/uploads/1/3/0/6/130622066/bopixif.pdf
    • http://poopbgone.net/uploads/1/3/0/5/130590550/668e0d1581ba89b.pdf
    • http://897788976207812023.com/uploads/1/3/0/5/130588515/bovulubidowukavut.pdf
    • http://vcemcom.org/uploads/1/3/0/6/130639209/zupolipurukemug.pdf
    • http://glennmartin.info/uploads/1/3/0/6/130639382/8907639.pdf
    • http://testserver.kathleenkeenan.com/uploads/1/3/0/4/130483348/581f58.pdf
    • http://pieceofmindproject.com/uploads/1/3/0/3/130323401/vuxowikanaxezinoxopa.pdf
    • http://saltcityvolleyball.com/uploads/1/3/0/7/130776049/sunusimumiz.pdf
    • http://mcfeesilversmith.com/uploads/1/3/0/2/130270738/82fe7f9965aa853.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_off000096c4.bin
d8625b4e816e232cf92d5212678df917cee72f44bf8650190a362fe1ec8f39ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C4 5104 bytes

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