Malicious PDF — malware analysis report

Static analysis result for SHA-256 760922490bb8da34…

MALICIOUS

PDF

33.0 KB Created: 2020-03-11 06:59:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c6d4b333a5d1f7e497f8e181208680ec SHA-1: 9062405cff054977db6c0943341b20dd3e876200 SHA-256: 760922490bb8da3441431b63c8b9025d03bf4b48cb5362aaca3e15deff675378
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a common technique for SEO spam or distributing malicious content. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful websites.

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://919.bpmtc.com/uploads/1/3/0/3/130313366/130313366.html#surah+rehman+ki+quran+tilawat
    • http://500palisades.com/uploads/1/3/0/2/130270903/rawanuwegaxesediju.pdf
    • http://www.cspplumbing.com/uploads/1/3/0/4/130483509/9639909.pdf
    • http://www.cakesbykim.co.uk/uploads/1/3/0/8/130814178/vikezibewinu.pdf
    • http://pixelfin.net/uploads/1/3/0/8/130813037/gevifamefikuf-jekas-dovow-tekadebenube.pdf
    • http://www.graywolfservicesllc.com/uploads/1/3/0/6/130620274/4d43f760fb.pdf
    • http://peerreviewthefilm.com/uploads/1/3/0/8/130813883/b8f8a.pdf
    • http://michellerodesinteriors.com/uploads/1/3/0/4/130475982/6658142.pdf
    • http://fairpath.org/uploads/1/3/0/8/130814234/susuz.pdf
    • http://fastloanprocessing.com/uploads/1/3/0/4/130488322/fitukovu_nupupigule_sanelap.pdf
    • http://egologic.co.uk/uploads/1/3/0/4/130475883/571345de75dc.pdf
    • http://shadowbendtest7.com/uploads/1/3/0/6/130621431/73800b.pdf
    • http://barnesjewelersonline.com/uploads/1/3/0/5/130589057/wiwifomij.pdf
    • http://siam-deluxe.com/uploads/1/3/0/7/130740065/32e3a64dc902.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_off0000588d.bin
68071ad64ed333b7829a8579dcccbdfd8a74e40c2aa3ef980dc4ad6173c676f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x588D 7332 bytes

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