Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e404a95d3cd1b3…

MALICIOUS

PDF

37.2 KB Created: 2020-06-01 21:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cb15a0de59a4a739a282e748b338b6c SHA-1: b4331a70d53b9d0210550657f6b2eb89225c45c9 SHA-256: 69e404a95d3cd1b32296e5d198658a0e0e0584b0936cd91d297914f7afb68c21
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links points to a content-luring or SEO-spamming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • 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://fairbankplanb.org/uploads/1/3/1/0/131070827/131070827.html#no+more+recipe+conflict
    • http://aerialstuntscootersfullforce.com/uploads/1/3/0/7/130775490/cdc4ea4d019409.pdf
    • http://star-method.com/uploads/1/3/0/3/130379294/4719d107f00f5ae.pdf
    • http://ipoftexaslaw.com/uploads/1/3/0/5/130551198/fipekigamadojisefum.pdf
    • http://capoeirafitbrooklyn.com/uploads/1/3/1/1/131164476/gijosomotiwe.pdf
    • http://almabellaretreats.com/uploads/1/3/0/9/130969458/86a6bdfe0df9.pdf
    • http://sweetridersexpressllc.com/uploads/1/3/0/3/130313567/saxemo.pdf
    • http://myjesustalk.com/uploads/1/3/0/3/130312923/2899184.pdf
    • http://sunshinecleaning.center/uploads/1/3/0/2/130291453/ziramutuvol-jaxujak.pdf
    • http://grisbucarest.com/uploads/1/3/1/4/131452836/9730ba98ead8.pdf
    • http://fairbankplanb.org/uploads/1/3/1/0/131070827/terms.html
    • http://fairbankplanb.org/uploads/1/3/1/0/131070827/dmca.html
    • http://fairbankplanb.org/uploads/1/3/1/0/131070827/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://voxidotusad.files.wordpress.com/2020/05/bomixugifokuroxofuwadira.pdf
    • https://kesakede.files.wordpress.com/2020/05/galubadedefafura.pdf
    • https://fuzevibob.files.wordpress.com/2020/05/funegidejurivotadu.pdf
    • https://tasoxilo.files.wordpress.com/2020/05/19168271214.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ca4.bin
fb6a5b47833d73c5fa4090d6daf897ab032da1f5db0f5f965861e137395f6934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA4 13292 bytes

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