Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce45943e1cf86be…

MALICIOUS

PDF

36.2 KB Created: 2020-06-15 17:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a12cbc416b3e53514e16dd406fc0ab76 SHA-1: 124db8ea4de5ee2516da0782b51c75349843d58a SHA-256: 1ce45943e1cf86be85961e566c7e5048f77f94350ac0a9d6beab0cad2b3619c5
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The document body is heavily obfuscated and contains embedded URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://westlakehoustoncollisioncenter.com/uploads/1/3/0/7/130775971/130775971.html#exercise+in+gym+for+weight+loss
    • http://owentart.com/uploads/1/3/0/4/130483745/toberosogokezulop.pdf
    • http://alaskacteplan.com/uploads/1/3/1/4/131452745/9334294.pdf
    • http://camfamediation.com/uploads/1/3/0/2/130289692/4752005.pdf
    • http://mail.lgifarms.com/uploads/1/3/0/5/130590310/984007.pdf
    • http://billwilsonjewelry.com/uploads/1/3/0/7/130739011/rexat-wuxow.pdf
    • http://genmorley.com/uploads/1/3/0/2/130271054/7264446.pdf
    • http://mcclureboatclubinc.com/uploads/1/3/0/7/130738657/b4298641bc66da.pdf
    • http://host42.carmichaelnl.com/uploads/1/3/0/7/130739039/nadigovawekudak-lujimevaw.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_off00006286.bin
b899cbd69a736001d607d0bcb2401b0cf0e40ee250751be057962952441ac04d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6286 10436 bytes

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