Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbc940ddd67a5ff…

MALICIOUS

PDF

39.9 KB Created: 2020-04-20 03:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e812284ca929dc16d02a9d31e2601d7b SHA-1: 96f5c2cbd95c57b03d39c6f6fca999229e6aa1ad SHA-256: 5bbc940ddd67a5ff22ff90660169ab5fbc0ddfd8da1b3a27b713e7747e5f04a0
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicating a link farm or redirection to malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs supports this assessment. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://stuartmorris.org/uploads/1/3/0/5/130588430/130588430.html#uk+best+man+speech+template
    • http://habibimodayelegancia.com/uploads/1/3/0/7/130775558/bafifajus.pdf
    • http://charlesodom.com/uploads/1/3/0/7/130740262/46da66.pdf
    • http://nnoodl.com/uploads/1/3/1/6/131607889/jozutuxonediwivet.pdf
    • http://xrenal.com/uploads/1/3/1/4/131437349/zivewotela_tapaf_galenenujafif_gimoduwenegivez.pdf
    • http://incomewebstores.info/uploads/1/3/0/4/130477309/1327999.pdf
    • http://theswingplane.com/uploads/1/3/0/6/130605125/xamoravekaf.pdf
    • http://gardenersparadise.net/uploads/1/3/0/3/130323092/zikurifa-wuzof-ritisukafufup.pdf
    • http://economicdevelopment.info/uploads/1/3/0/6/130604040/losonojoxizulo.pdf
    • http://schrollsoccer.com/uploads/1/3/0/3/130379151/935cda73.pdf
    • http://decksunlimitedwy.com/uploads/1/3/0/2/130289481/49c067c72a3383c.pdf
    • http://d21ci.com/uploads/1/3/0/7/130775440/mizepidajovijidi.pdf
    • http://matthewjensenskinner.com/uploads/1/3/0/5/130588570/c8bf70a439a.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_off0000758e.bin
d7fcb5fe65834eb1250b0724550eeacaf04b8c3abb7b5548269f4a50cbdfd3de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758E 7752 bytes

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