Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc35caaab01da9a2…

MALICIOUS

PDF

33.6 KB Created: 2020-03-23 14:31:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0e6006ecc081935da57a80a79d221e4a SHA-1: 947e63ca6cb70350a8f66dc0085ab03fb5c01686 SHA-256: fc35caaab01da9a2c9c397f866acef09454d6b925f9d8904656e5f62d7e9d409
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, many of which point to PDF files with numeric slugs, suggesting a link farm or SEO abuse tactic. The document body explicitly mentions "Tamil 2019 hit songs zip file download", indicating a lure to entice users to click on the embedded links. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://capefearforge.com/uploads/1/3/1/0/131070872/131070872.html#tamil+2019+hit+songs+zip+file+download
    • http://piratevip.com/uploads/1/3/0/4/130435925/8308319.pdf
    • http://www.bridesewbeautiful.org/uploads/1/3/0/7/130738501/jasunupitelixa-dafokebu-pekobon.pdf
    • http://dpmediaonline.org/uploads/1/3/0/4/130476263/motivejotelakabevaz.pdf
    • http://starvedrockrealestate.com/uploads/1/3/0/4/130435638/9821491.pdf
    • http://taylorteaching.org/uploads/1/3/0/3/130323332/7709054.pdf
    • http://artm.online/uploads/1/3/1/1/131164387/1262a7639b6997.pdf
    • http://www.abusinesswithnocustomers.com/uploads/1/3/0/3/130323593/b7440.pdf
    • http://inthemomencreativeexpressions.com/uploads/1/3/0/7/130775241/3259641.pdf
    • http://www.angusmaciverbuildingsupplies.co.uk/uploads/1/3/0/8/130874248/zavuluwin-pekakuf.pdf
    • http://bluejeanslifestyle.com/uploads/1/3/0/6/130621757/be8ce.pdf
    • http://www.harborhillsbowl.com/uploads/1/3/0/6/130621202/ruwasew_vavemaso.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_off00005c54.bin
d17d2aebbb3394e896ac21c41968ca33e3d1c912084e70cb17e3e73892e1950a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C54 7456 bytes

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