Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fcf4602f68b43bd…

MALICIOUS

PDF

38.7 KB Created: 2020-03-10 10:05:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bdb987eab2c6d4d0a0aeadeabb7b7f5f SHA-1: 33010a913f207e73f00b0b3635cf9b640ec35c7e SHA-256: 0fcf4602f68b43bdb067a8a8d1ea87c38759236a43e8c0a07130c7fe22ffb93c
96 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, disguised with a seemingly innocuous title about typing in Hindi. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a tactic to drive traffic to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the extensive link farm points towards a content-luring or phishing attack.

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://www.cloud.sentinel-air.com/uploads/1/3/0/4/130488688/130488688.html#how+to+type+in+hindi+in+ms+word+using+english+keyboard+in+windows+10
    • http://dollarwitch.com/uploads/1/3/0/8/130813032/nixadozavu.pdf
    • http://www.ethicadev.com/uploads/1/3/0/5/130546283/326834.pdf
    • http://www.flexiblearmour.com/uploads/1/3/0/5/130590217/a98758.pdf
    • http://aenderungschneiderei-musovic.com/uploads/1/3/0/4/130494389/a2751fdf7.pdf
    • http://ritasbeautysupply.com/uploads/1/3/0/8/130814858/lejanomer.pdf
    • http://inspiredwellness411.com/uploads/1/3/0/5/130588560/40c583e7.pdf
    • http://printable-ebooks.com/uploads/1/3/0/7/130775961/f9c76.pdf
    • http://mizzoureview.com/uploads/1/3/0/4/130488396/muzidumimazidew-laresonalamaba-didenas-safiribuzimu.pdf
    • http://www.natalieboden.com/uploads/1/3/0/6/130605135/ebd5c010ae8c.pdf
    • http://ryanhealey.com/uploads/1/3/0/5/130543985/a31b8f95eeb250b.pdf
    • http://imyd.com/uploads/1/3/0/2/130272396/c857ed1a.pdf
    • http://panglab.org/uploads/1/3/0/9/130969915/7457852.pdf
    • http://jecollectables.co.uk/uploads/1/3/0/2/130270864/nivibaxifotavutini.pdf
    • http://natashiapandther.com/uploads/1/3/0/6/130620614/koxiponut-xidekuwerikoki.pdf
    • http://moleculeminions.com/uploads/1/3/0/6/130620576/vitid.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_off00006bb1.bin
b5a2f0833902dc30674c7082ba38b84e98f256036d3c5104504c23047c06add6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB1 8032 bytes

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