Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccbff666a91cdba0…

MALICIOUS

PDF

38.5 KB Created: 2020-03-20 05:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c312319fbe67b6a87ffdd56642ffd4dc SHA-1: e38885b35daa7d50f0dc137c8f703b0c298532c1 SHA-256: ccbff666a91cdba0496f81b02467135826723c531636c480ab711d1f22d998a5
92 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 User Execution

This PDF document contains a large number of external links, identified as a PDF SEO link farm. The document body text is heavily obfuscated but contains references to a 'mechanical handbook' and the authoring application 'wkhtmltopdf'. The primary attack pattern involves redirecting users to numerous external PDF files hosted on various domains. No scripts were extracted from this sample, and the malicious intent is inferred from the link farm heuristic and the ML classifier.

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://projectrangatahi.com/uploads/1/3/0/2/130272072/130272072.html#ncees+fe+mechanical+handbook
    • http://inspiredbystacey.com/uploads/1/3/0/8/130814172/4dfcffd8.pdf
    • http://blockinsight.com/uploads/1/3/0/6/130621447/lokevipibawa.pdf
    • http://lindseyvlasman.com/uploads/1/3/0/5/130550882/juwebovofetexi.pdf
    • http://lightningbabe.net/uploads/1/3/0/4/130489152/genufe.pdf
    • http://mevsimyalitim.com/uploads/1/3/0/8/130874175/tepomipodaropemive.pdf
    • http://oxygentraveladvisors.com/uploads/1/3/0/7/130775666/06d2dab7015.pdf
    • http://openroof.org/uploads/1/3/0/6/130621421/ridedaniwegisixuremi.pdf
    • http://websitecontentnow.com/uploads/1/3/0/5/130543543/devinasubax.pdf
    • http://ibuygizmo.com/uploads/1/3/0/7/130738846/bulimunuso-wewaranama.pdf
    • http://cultureswimwear.com/uploads/1/3/0/4/130475909/salazolikuj.pdf
    • http://popularbusinessbooks.com/uploads/1/3/0/6/130621459/7519692.pdf
    • http://www.verenaboehm.com/uploads/1/3/0/6/130621019/wepepuwupati-bekigegemep-fadevorawojosu-rovukob.pdf
    • http://satintiger.com/uploads/1/3/0/3/130379635/razaremijeb.pdf
    • http://rareandbeautifullamps.com/uploads/1/3/0/4/130435682/zunavatomipodab_bozasorafo_benarinomavojif_votelakunefe.pdf
    • http://wizardsandwolves.com/uploads/1/3/0/5/130588320/9213390.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_off00006c64.bin
bfc4c6757cf87565a47d574bcd3db4530feaf5550009014546e5169e6fafcd8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C64 8512 bytes

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