Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5639f2c65a80d3…

MALICIOUS

PDF

32.1 KB Created: 2020-05-06 23:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4b2552e3bcc7743702b92adef22da786 SHA-1: cc7d56d9065a0ef653ded2de287c9efc2712bf68 SHA-256: 7d5639f2c65a80d3b0c29dcb12c969479c1344210fc9213b24ae7e09948e643e
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent. The document body contains a URL that appears to be a lure for 'bala bala song video pagalworld', which is likely a pretext to drive traffic to the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://trindadeyoga.com/uploads/1/3/0/6/130621937/130621937.html#bala+bala+song+video++pagalworld
    • http://retrobikesdublin.net/uploads/1/3/0/4/130488165/dakiwuwewezud_felax_jajawidan.pdf
    • http://berryjaneusa.com/uploads/1/3/0/3/130379371/kemejekujemilu.pdf
    • http://galwayglazingservices.com/uploads/1/3/0/6/130621901/vopigobajalup.pdf
    • http://propatoinclandscaping.net/uploads/1/3/0/4/130491179/jufakusokopeginimub.pdf
    • http://coffeecultureconnections.com/uploads/1/3/0/3/130379289/9bf7acc43f3ca0.pdf
    • http://karinkashmieklund.com/uploads/1/3/0/7/130739682/vanob-bowewe-simanusupuwete.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/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_off000050f5.bin
ed722ce80d7c1b47d986683f78c47e8b438ee904e319f5b9af892504c16e36a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50F5 11148 bytes

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