Malicious PDF — malware analysis report

Static analysis result for SHA-256 23dbfbbc2a516b5e…

MALICIOUS

PDF

44.4 KB Created: 2020-03-24 22:57:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1f6b660862688c673a17a00a2120b520 SHA-1: 56559bc9d95d175be4abea92ec5910c8a9dfe852 SHA-256: 23dbfbbc2a516b5e52158452b2b79b7ecbd744f734d2e09c73d9648a8d242751
94 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 are numerically or generically named, suggesting a link farm or SEO abuse tactic. The document body, though partially corrupted, contains text related to children's games and the wkhtmltopdf generator, indicating a deceptive lure. The primary intent appears to be directing users to a network of potentially malicious websites hosted on various domains.

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://myersmindset.com/uploads/1/3/0/2/130289732/130289732.html#juegos+de+mesa+para+ni%C3%B1os+11+a%C3%B1os
    • http://daphoopsbasketball.com/uploads/1/3/0/5/130540021/8488154.pdf
    • http://detectiveagence.com/uploads/1/3/0/7/130740046/vuxufod.pdf
    • http://madcarn.com/uploads/1/3/0/6/130604602/9596f2697b27c33.pdf
    • http://psdalton.com/uploads/1/3/0/6/130640052/a9ac82d4599.pdf
    • http://angrypenguinapps.com/uploads/1/3/0/3/130313360/761181.pdf
    • http://naturalcityfurniture.co.uk/uploads/1/3/0/2/130291784/3690205.pdf
    • http://jlmarketingsolutions.net/uploads/1/3/0/9/130969754/47cf596a88a.pdf
    • http://twinrigfishing.com/uploads/1/3/0/2/130287817/pinuxukad-datobesuf.pdf
    • http://blisstravel.info/uploads/1/3/0/5/130588810/tilinuxobekotujudi.pdf
    • http://mynukshuk.com/uploads/1/3/0/6/130640022/zakak.pdf
    • http://mossfrogoutfitters.com/uploads/1/3/0/6/130604902/bonarex_xepubowuxagav_zijadudiru_suzeb.pdf
    • http://lwilliamscounseling.com/uploads/1/3/0/7/130739827/1847407.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_off000082e3.bin
5209468756f746b0c99774c619e13b8939dd8e23b2a4ca4b60e836a24fb22f4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E3 8680 bytes

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