Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37e67c9cc7a8526…

MALICIOUS

PDF

41.0 KB Created: 2020-04-18 21:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: eec8e72cb2dd324f4b7cfb4b6102a765 SHA-1: e9cf6acfe8809a9c8b193c46e34cb88f7cbca685 SHA-256: e37e67c9cc7a85261031f501cc3b357e39b39b8ddea770b122906dfcec1873ed
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are structured to appear as book downloads, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. The embedded URLs are the primary indicators of malicious activity, directing users to potentially harmful content.

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://indoorqualityaircody.com/uploads/1/3/0/4/130488158/130488158.html#angelika+neuwirth+books+pdf
    • http://tawnellhobbs.com/uploads/1/3/0/6/130604109/b77ef6e98.pdf
    • http://gallatinvalleyhomes.com/uploads/1/3/0/3/130323115/ac5e4d818e11.pdf
    • http://simon-rumble.com/uploads/1/3/0/6/130639117/bojojojun_xedode_fugeguzekimaja.pdf
    • http://od3d.net/uploads/1/3/0/7/130740442/lelijezakakew.pdf
    • http://melaniehunterlaw.com/uploads/1/3/0/5/130541662/0a3476287fb6.pdf
    • http://iammichaelwillis.com/uploads/1/3/1/3/131398145/e791da19a03cc4.pdf
    • http://tuckerlevinlaw.com/uploads/1/3/1/4/131406118/pitubukaf-semoduv.pdf
    • http://reafpropertygroup.com/uploads/1/3/1/4/131406605/f78627dc.pdf
    • http://susiesbistroandbakery.com/uploads/1/3/0/5/130588239/zitazaw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061c2.bin
2b0a5f8bc264e8658eea615c229a41fb14b666aec90de101bdd10167acb36ea3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C2 8948 bytes
font_01_sfnt_off00008264.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8264 16204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.