Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a03d657fa7e852…

MALICIOUS

PDF

83.1 KB Created: 2020-06-02 23:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26ec60b23fe6ecea56bdeb756f1efb3c SHA-1: 00593f3a16f0ca17fdeceef17a1f143e5eec78ff SHA-256: 32a03d657fa7e852e55d92dbb3349fa17500862bbdc9ea54d69575783ebfceb2
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to domains commonly used for SEO spam and malware distribution. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs that are likely part of a link farm or SEO manipulation strategy. The primary attack pattern involves directing users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://darlenelyon.net/uploads/1/3/1/4/131410597/131410597.html#monk+robe+pathfinder
    • http://philliphickey.com/uploads/1/3/0/7/130739648/96fad67a.pdf
    • http://o2nri.club/uploads/1/3/0/5/130538995/3505ba44.pdf
    • http://webdisk.leelegantmacaron.com/uploads/1/3/1/3/131380086/givosuw-kiwopukigefiro.pdf
    • http://elaneducation.org/uploads/1/3/0/2/130287278/widimoke.pdf
    • http://hanohytta.com/uploads/1/3/0/7/130739592/2172568.pdf
    • http://lcproperty.org/uploads/1/3/1/4/131408168/bevololapa.pdf
    • http://darlenelyon.net/uploads/1/3/1/4/131410597/terms.html
    • http://darlenelyon.net/uploads/1/3/1/4/131410597/dmca.html
    • http://darlenelyon.net/uploads/1/3/1/4/131410597/policy.html
    • http://hanohytta.com/uploads/1/3/0/7/130739592/2172568
    • https://tuguwanenuze.files.wordpress.com/2020/05/goxuwamomexowa.pdf
    • https://zomupomusevo97283690.files.wordpress.com/2020/05/jemezipopuw.pdf
    • https://rezitofu.files.wordpress.com/2020/05/6705485454.pdf
    • https://mozabowo.files.wordpress.com/2020/05/mividuzeru.pdf
    • https://napipivo.files.wordpress.com/2020/05/3585777624.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_off00011caa.bin
58bdd1c0f52625d5d3cc97878ab0836f2a214981968b72c10b05c89d31297c89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAA 10752 bytes

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