Malicious PDF — malware analysis report

Static analysis result for SHA-256 01411bc89047daf1…

MALICIOUS

PDF

32.4 KB Created: 2020-05-26 17:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb18c5abe22261dd6f80cd7efa7b4c14 SHA-1: c2d40b3c891cb009ad300cbdd663bd4fb4666734 SHA-256: 01411bc89047daf114312375e660169a39caceb9e355ffcdd17e8b85b485ea9d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The PDF document contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, suggests a 'Western civilization ii study guide' lure. The ML classifier strongly indicates maliciousness, and the embedded URLs are likely used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://hardy2.pleasingfood.com/uploads/1/3/0/5/130550711/130550711.html#western+civilization+ii+study+guide
    • http://clinicgeek.org/uploads/1/3/1/3/131381374/fitipazejofoku.pdf
    • http://dragonplastics.com/uploads/1/3/0/7/130775756/jenugovagapud.pdf
    • http://tommymangos.com/uploads/1/3/1/4/131484029/voxipuwunogojezuzi.pdf
    • http://cowellengineering.net/uploads/1/3/0/4/130490928/52af9af465.pdf
    • http://cpaforrealestate.com/uploads/1/3/1/6/131637257/3791630.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_off0000523d.bin
b152f0675db71e4d35059612f6849a681ea5053a3b67ff1a937f89b48e994003		 pdf-font-stream PDF embedded font (sfnt) at offset 0x523D 10792 bytes

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