Malicious PDF — malware analysis report

Static analysis result for SHA-256 1907d3438f91bfff…

MALICIOUS

PDF

33.2 KB Created: 2020-03-29 22:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6842e7eb1cf27e143d19fb2907ca859f SHA-1: 576c7a6098cd0d5cc5c043db07659cfbfd633207 SHA-256: 1907d3438f91bfff9b722f4c4f46696a6ea037b51a553efda8aa6086be4bc480
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a mass of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. These links point to numerous PDF files hosted on various domains, suggesting a tactic to manipulate search engine results or distribute content indirectly. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine a more specific malicious intent beyond link distribution.

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://afaparents.org/uploads/1/3/1/4/131438453/131438453.html#monroe+township+rec+baseball
    • http://travelartisans.net/uploads/1/3/0/4/130483325/tizaniwotevewute.pdf
    • http://autoglassgrapevinetx.com/uploads/1/3/0/7/130775740/422344.pdf
    • http://andyfunke.com/uploads/1/3/0/2/130289393/4070802.pdf
    • http://girishmithran.com/uploads/1/3/0/8/130874087/8331665.pdf
    • http://knoxvilleangels.org/uploads/1/3/0/6/130620563/31269.pdf
    • http://braveangelyoga.com/uploads/1/3/0/8/130874055/1862729.pdf
    • http://lilyfairgifts.com/uploads/1/3/1/1/131164497/3689466.pdf
    • http://gymfanaticwear.com/uploads/1/3/0/7/130775268/fenedu.pdf
    • http://ebikeakaroa.co/uploads/1/3/0/7/130776814/e25e4f.pdf
    • http://tcjft.com/uploads/1/3/0/5/130550763/a84c53111c0e66.pdf
    • http://ciomentor.net/uploads/1/3/0/7/130776436/70d0e065ebba.pdf
    • http://xn--80aaamccddz1cejfabslm9c.xn--p1ai/uploads/1/3/0/6/130622068/4140791.pdf
    • http://mysmartflower.com/uploads/1/3/0/6/130639139/b07bbfedf3.pdf
    • http://strongfamily.info/uploads/1/3/0/4/130483207/lodomalakedo-ginamiwasiv-rebatonamaxe.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_off00005a1f.bin
182e2b0f3d59b703c7d423c94fd7587c53de2c6c264a0d6ba43cd6a10a1b55ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1F 7516 bytes

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