Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1820ccee50f3e93…

MALICIOUS

PDF

33.9 KB Created: 2020-05-08 20:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 21cf6f4a682457758a4a44ae9541f611 SHA-1: 6d63c5948849ec5807bd23d5c3d87c07f2951464 SHA-256: c1820ccee50f3e9300164e2279481f9792e106c717374272e21275b945f4e80b
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains keywords related to terrorism and the tool used to generate the PDF, suggesting a lure to attract search engine traffic. The primary intent appears to be driving traffic to a network of linked domains, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://donimorrison.com/uploads/1/3/0/6/130621461/130621461.html#terrorismo+causas+y+consecuencias+pdf
    • http://junkmen.net/uploads/1/3/1/4/131452846/mones.pdf
    • http://havanamoments.com/uploads/1/3/1/3/131384291/lakileta-xadozulotomu-wugekepebur-jirebusob.pdf
    • http://thepolishedhouse.com/uploads/1/3/0/6/130640110/lanijeret.pdf
    • http://iguanamamashoreexcursions.com/uploads/1/3/0/6/130621382/wuravipaxive.pdf
    • http://mftmb.com/uploads/1/3/1/3/131381806/e00838e919109.pdf
    • http://shs-wuppertal.org/uploads/1/3/1/4/131406680/8050932.pdf
    • http://jeffersonc123.org/uploads/1/3/0/6/130620833/08fd1f91d.pdf
    • http://janekrateduda.com/uploads/1/3/0/5/130550743/gatomi.pdf
    • http://pearlmartinezlmft.com/uploads/1/3/0/6/130621461/jipujemafelit.pdf
    • http://arlingtoncarpetcleaner.com/uploads/1/3/0/6/130604108/wawojufazameje.pdf
    • http://enclosedtrailershouston.net/uploads/1/3/0/5/130590383/f0e89bfd0acb4.pdf
    • http://scservicesky.com/uploads/1/3/1/3/131383045/2c713a6e2bb5e0d.pdf
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056d5.bin
4af1395e2323688727e93492203c84c010aba7ff2418ac746eaa21cecd130ac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56D5 11464 bytes

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