Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f88d5649f68e6cc…

MALICIOUS

PDF

45.8 KB Created: 2020-03-20 02:02:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b80733c1b34fef787412d6127414f198 SHA-1: 8898f18e83ef0d1596d43083bcdd07eef4e95e3a SHA-256: 4f88d5649f68e6ccb53f700e4726de2490795490b042850e00ed77696313490d
92 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with 19 links pointing to various domains. The primary heuristic indicates a PDF SEO link farm, suggesting a tactic to distribute malicious content or redirect users. The embedded URLs and the nature of the PDF structure strongly indicate a malicious redirection or phishing attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://meredithbirrell.com/uploads/1/3/0/4/130483772/130483772.html#m%C3%A9todos+de+valuaci%C3%B3n+contabilidad
    • http://sincerely-amber.com/uploads/1/3/0/4/130478009/gaviwovi.pdf
    • http://www.beautesache.ru/uploads/1/3/0/7/130740477/xibizuguvij.pdf
    • http://jaimodallc.com/uploads/1/3/0/7/130775125/2d0e82.pdf
    • http://bleached.net/uploads/1/3/0/2/130289809/webaxinod.pdf
    • http://hescogardens.com/uploads/1/3/0/4/130483937/7968074.pdf
    • http://sinhouelabel.com/uploads/1/3/1/1/131163684/jemepoduzi.pdf
    • http://zainataparal.com/uploads/1/3/0/2/130272648/tulaketuzawonozigopi.pdf
    • http://www.paramountscareers.com/uploads/1/3/0/7/130775678/kovowalawoguba-vusumowo.pdf
    • http://amjav.com/uploads/1/3/0/5/130539072/tibuzodozox-velovenedukelox-mubiwi.pdf
    • http://antconsultationrooms.com/uploads/1/3/0/5/130590511/f318173.pdf
    • http://www.skillassoundandvision.com/uploads/1/3/0/4/130435985/3422884.pdf
    • http://mbyj.net/uploads/1/3/0/6/130621098/2327767.pdf
    • http://carriewinfield.com/uploads/1/3/0/6/130620730/revafavejesavi.pdf
    • http://radio-pictures.com/uploads/1/3/0/2/130288364/9007823.pdf
    • http://royalbluehousing.com/uploads/1/3/0/6/130603968/8b977cb0fd48.pdf
    • http://shiftshop.org/uploads/1/3/1/0/131071188/fafonuzeju.pdf
    • http://mail.jasondozierphotography.com/uploads/1/3/0/5/130539084/jenemizebab.pdf
    • http://thebananastudio.co.uk/uploads/1/3/0/8/130873801/fizokujutaxaf.pdf
    • http://unitedcraftgrowers.com/uploads/1/3/0/4/130489706/8978520.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007382.bin
5cd719d98b2021cf7e12e3f3fcaf40babc31ea8f47dcde061b1f221fb7e6405b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7382 8628 bytes
font_01_sfnt_off000092b1.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92B1 16036 bytes

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