Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b107522241b62c6…

MALICIOUS

PDF

37.9 KB Created: 2020-03-29 08:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c0149681d3972ec992aed3f287dda521 SHA-1: 3ea06ba83b6389343d790c3ac989a50f28dbd5ac SHA-256: 3b107522241b62c66aba273a745a7725b530241694e1bddf6c899f22eef33ac5
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to PDF files hosted on unrelated domains. The document body, though heavily obfuscated, contains references to a 'Pioneer pl 550x turntable' and the authoring application 'wkhtmltopdf', suggesting a lure to external content. The heuristic PDF_SEO_LINK_FARM indicates a deliberate attempt to create a link farm, a common tactic in SEO poisoning and phishing campaigns. The ML classifier strongly supports the malicious nature of this PDF.

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://74-123-72-53.mgwnet.com/uploads/1/3/0/6/130639750/130639750.html#pioneer+pl+550x+turntable
    • http://essentialpleasure.com/uploads/1/3/0/9/130969499/3120014.pdf
    • http://theopengarage.com/uploads/1/3/0/8/130814290/ketijilu.pdf
    • http://smithscateringholbrook.com/uploads/1/3/0/2/130270866/423f5f25.pdf
    • http://heritageaffinity.com/uploads/1/3/0/5/130551299/591cc21d30db4f.pdf
    • http://pittybullystaffyaddicts.com/uploads/1/3/0/5/130589186/501546.pdf
    • http://retreatwellnessboutique.com/uploads/1/3/0/5/130589049/ba8e8b4aae.pdf
    • http://l-arginine-supplement.com/uploads/1/3/0/6/130640049/jejebap.pdf
    • http://casachurba.com/uploads/1/3/0/6/130604627/5532346.pdf
    • http://forplayindustry.com/uploads/1/3/0/6/130621182/cc24d62.pdf
    • http://closedeck.com/uploads/1/3/0/8/130874156/mipagijigudi_tezokufofij_gedupidexiz.pdf
    • http://cowboysantiquesandmore.com/uploads/1/3/1/3/131398296/xonatajoxinudevo.pdf
    • http://mx.faithwc.com/uploads/1/3/0/6/130639958/nozikedesuroroz-damuvemefofan-ragogosixe.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_off00006bf9.bin
e302c75066bd4cccec9403679c7ec0d1dbbc5ce0ee1ff48ad278e954ea30beed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF9 8084 bytes

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