Malicious PDF — malware analysis report

Static analysis result for SHA-256 2702e955cd68ba24…

MALICIOUS

PDF

33.7 KB Created: 2020-06-08 03:38:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0021764d7bd748e7aa320ab73b9f3b2 SHA-1: 4ed726ce488ec2ca2db082f96a2ef026d61e16d1 SHA-256: 2702e955cd68ba24e7cfc8617f093ce592c38b89c6688fb982a848bec13c89c7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566 Phishing T1204 User Execution T1059 Command and Scripting Interpreter

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded document body text, though partially corrupted, contains URLs that are also present in the extracted URL list, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • ClamAV: Pdf.Dropper.Agent-8735036-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8735036-0
  • 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://aroundtheclocktots.gammaxiques.org/uploads/1/3/0/7/130738988/130738988.html#singham+d%25C3%25B6n%25C3%25BCyor+t%25C3%25BCrk%25C3%25A7e+dublaj
    • http://dinkydodah.com/uploads/1/3/0/7/130738567/kesotadotuvowawepuxo.pdf
    • http://thepolishedhouse.com/uploads/1/3/0/4/130489102/a0a85.pdf
    • http://rachelkick.com/uploads/1/3/1/4/131454415/6420036.pdf
    • http://hinojusu.net/uploads/1/3/0/2/130272484/jetofilatemi_gavalizatidekew_sebiwakomuta.pdf
    • http://4lr.undesirable.us/uploads/1/3/1/1/131164352/bacc2e96f1ddb6.pdf
    • http://kaizenventurepartners.com/uploads/1/3/0/6/130621941/5439449.pdf
    • http://134.undesirable.us/uploads/1/3/0/4/130489417/gorusogif.pdf
    • http://lasna.org/uploads/1/3/0/4/130476502/lilalesaka.pdf
    • https://lulagodirej.files.wordpress.com/2020/06/zadiviwaradaki.pdf
    • https://botemep98974298.files.wordpress.com/2020/06/fawub.pdf
    • https://sipemuxi.files.wordpress.com/2020/06/60506379251.pdf
    • https://valunip.files.wordpress.com/2020/06/kogakodife.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_off00005309.bin
b35f9ef973115c9034f9ca07c91333f314e71f0464085e5fe0b2f99dee2ffe8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5309 12340 bytes

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