Malicious PDF — malware analysis report

Static analysis result for SHA-256 099d0dae243c13d3…

MALICIOUS

PDF

37.0 KB Created: 2020-04-17 10:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 42b178560de11cee133fa36341bb9509 SHA-1: d1d63fe8dd3717331fe7f53e1a7ffe70aad68d33 SHA-256: 099d0dae243c13d32dcc07bdfacb22531acc4156d85eb25a3ed627fb79266f4f
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, suggesting a link farm or redirection scheme. The presence of a heuristic indicating a 'Fake invoice / payment lure' combined with the embedded URL points towards a phishing attempt. The ML classifier strongly indicates maliciousness, and the document's structure with many external links is a common tactic for distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://allaymedicinal.com/uploads/1/3/1/6/131606393/131606393.html#airtel+bill+payment+receipt+format
    • http://999true.com/uploads/1/3/0/5/130590663/4412922.pdf
    • http://lilart.fr/uploads/1/3/0/4/130478244/ad018d405.pdf
    • http://nicolemattoneillteam.com/uploads/1/3/0/7/130776245/gedorezofokixovofabe.pdf
    • http://kaiministries.net/uploads/1/3/0/6/130621031/mejuxulisutujopi.pdf
    • http://joanwills.com/uploads/1/3/0/5/130588625/nekodibegiraped.pdf
    • http://shannamcfarlane.com/uploads/1/3/1/3/131381151/xefuba.pdf
    • http://orchc.com/uploads/1/3/0/7/130774993/vividabajomojin.pdf
    • http://coachjfalcon.com/uploads/1/3/0/5/130551000/nomadenitov_xubaki_beremajutap.pdf
    • http://teamgunnfishing.com/uploads/1/3/0/5/130539660/dikajagubezo.pdf
    • http://tomorrowlogy.com/uploads/1/3/0/2/130289493/8427172.pdf
    • http://lavilladechinon.com/uploads/1/3/0/6/130639121/fumaj.pdf
    • http://tatianasophia.com/uploads/1/3/1/3/131379815/9056426.pdf
    • http://precisionsprayparts.net/uploads/1/3/0/6/130620808/4259978.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_off000069d9.bin
c6cbeeefc45392cf6e9aa6ad033337382cbf5092eca892ea0cd6123d4bafd099		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D9 7112 bytes

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