Malicious PDF — malware analysis report

Static analysis result for SHA-256 73974aeca6bfb927…

MALICIOUS

PDF

35.7 KB Created: 2020-04-06 15:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d56bd68c1200c12d8ecbe6bcf8c1b00d SHA-1: dea96ffaff187bca5a8081e29dd7a876a77d178c SHA-256: 73974aeca6bfb9270e0546c4a308fd51a0dad8bd729db047f8699c3f044b23f7
96 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, embedding a large number of external URLs. The primary heuristic indicates a mass external PDF link farm, suggesting the document's purpose is to redirect users to potentially malicious content hosted on these external sites. The ML classifier strongly supports the malicious nature of this PDF.

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://phyllisgutmannart.com/uploads/1/3/1/4/131409264/131409264.html#johnsonite+rubber+cove+base+product+data
    • http://genomslagskraft.com/uploads/1/3/1/4/131437341/bipekujomewizobivudi.pdf
    • http://kosmetyczka-gdanskosowa.pl/uploads/1/3/1/3/131379868/33707.pdf
    • http://foxcompetitionbikinis.com/uploads/1/3/0/9/130969824/8873976.pdf
    • http://advbrand.com/uploads/1/3/0/7/130776336/taluwusanavuvug_javos_juborumosuju_naxita.pdf
    • http://visithmb.com/uploads/1/3/0/6/130621480/boronixiwakov.pdf
    • http://nichollsmaguire.com/uploads/1/3/0/5/130539679/tefedoboru.pdf
    • http://mountainplayschool.com/uploads/1/3/0/7/130738578/138cabdf.pdf
    • http://markroselaw.com/uploads/1/3/0/9/130969065/setepatutigeluw.pdf
    • http://votecindy.ca/uploads/1/3/0/3/130379098/5371611.pdf
    • http://cutyourcablebill.tv/uploads/1/3/0/4/130477083/9473273.pdf
    • http://aaronag.net/uploads/1/3/0/9/130969604/bfd96727c.pdf
    • http://juliakurnik.com/uploads/1/3/0/7/130738693/c79e263fea.pdf
    • http://puffnstuffinc.org/uploads/1/3/0/4/130489075/18b157ba9c3fe.pdf
    • http://hansenfirm.com/uploads/1/3/1/4/131453631/putakap.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_off00006346.bin
b2d26c498e54360b4f8b173382354ad573b53e5cb5b15c3f6d7ffcbf0cca466f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6346 8100 bytes

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