Malicious PDF — malware analysis report

Static analysis result for SHA-256 080824c2adc19959…

MALICIOUS

PDF

30.5 KB Created: 2020-05-15 05:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0846e2624288628bef53edc3a6c21d2 SHA-1: 93361c1238e9f6a1b7f6f5be5b320cd1de30df61 SHA-256: 080824c2adc19959d88e3e8595dac87ad49f4f77ed7a2d95e481f63cb750fbf6
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a 'link farm', suggesting an attempt to redirect users to malicious websites. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. The document body, though heavily obfuscated, contains URLs that are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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://insureapplewatch.com/uploads/1/3/1/6/131606420/131606420.html#foam+sheet+roller
    • http://paradisepropertyservice.com/uploads/1/3/0/7/130775076/3364730.pdf
    • http://cashforpaymentsinc.com/uploads/1/3/0/4/130476885/6538375.pdf
    • http://jenntreado.com/uploads/1/3/1/4/131453330/rivorojegepadike.pdf
    • http://mothersdaymilers.org/uploads/1/3/0/7/130739892/20aaf6.pdf
    • http://liventconstruction.net/uploads/1/3/0/8/130874519/tajuleliril.pdf
    • http://patmanug.com/uploads/1/3/1/6/131637306/tiwun-fojuvodirorezup-kololuzerob-loditop.pdf
    • http://purseonalityny.info/uploads/1/3/1/6/131636922/kefabidutenede.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bc9.bin
da5aae1b19c5791736062a28756c48e8dfbbacf2070fd414fce4ad9008b5cc96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BC9 10428 bytes

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