Malicious PDF — malware analysis report

Static analysis result for SHA-256 3041421cbfe6e55e…

MALICIOUS

PDF

31.7 KB Created: 2020-03-29 22:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f08848632948baa9424dfb54799ed413 SHA-1: 9634b9c07112993d30ce25f951054f7d1de12207 SHA-256: 3041421cbfe6e55e46d686f459aa8267b3501ad615105dbfe8270da77615d19a
94 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. The document body, though partially corrupted, contains text related to 'Miller trailblazer 302 efi specs' and embedded URLs, suggesting a lure to external content. The ML classifier strongly flagged this PDF as malicious, and the presence of many external links reinforces the assessment of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://sta-66-99-58-206.ladse.org/uploads/1/3/0/9/130968925/130968925.html#miller+trailblazer+302+efi+specs
    • http://appelsmeier.com/uploads/1/3/0/3/130313157/0441c886293.pdf
    • http://smartchoiceagentswi.com/uploads/1/3/0/6/130639780/moranubojag.pdf
    • http://cofrefinanciero.com/uploads/1/3/0/2/130274109/2f9f2.pdf
    • http://bonafidecertified.com/uploads/1/3/0/2/130272355/xikosum_fevatuxatebirag.pdf
    • http://bethesda-heilungsdienst.com/uploads/1/3/1/3/131378837/nizebulufevudibidoj.pdf
    • http://m-squaredassociates.com/uploads/1/3/1/0/131070890/kapulewubum.pdf
    • http://ryanmatthewmiller.com/uploads/1/3/0/9/130969983/3598371.pdf
    • http://walkaway-jugendweihe.de/uploads/1/3/0/5/130551155/7831730.pdf
    • http://huronvillas.com/uploads/1/3/1/1/131164424/9056485.pdf
    • http://camilabellydance.com/uploads/1/3/1/0/131069934/7bf4fd6e50b1.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_off00005524.bin
d1ebb78e6473a508ae00695b4eaf19a564273cca5694a4330d3a2716b0e36eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5524 7380 bytes

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