Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c30ad9d2d7f4f3…

MALICIOUS

PDF

41.4 KB Created: 2020-06-21 12:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cedd246533358490a29cc374133f10c5 SHA-1: b431590fbe9b8d2c25e870419a483f92f33f52e8 SHA-256: d9c30ad9d2d7f4f3de7c4569776993eca645dfb9a45d7b14d00c77d7ffd9c17c
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of numerous external URLs supports this assessment. No scripts were extracted, but the structure and URL patterns are indicative of a malicious distribution or redirection scheme.

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://mail.cultivateyoga.com/uploads/1/3/0/6/130639534/130639534.html#pole+dancing+lessons+durham+nc
    • http://autodiscover.pelilens.com/uploads/1/3/0/4/130488694/gabujij-nurod.pdf
    • http://fieldnotes.it/uploads/1/3/0/8/130874298/tafoxajof.pdf
    • http://fashionandjesuspassion.com/uploads/1/3/1/4/131407797/medobubizerito.pdf
    • http://mahi.org.nz/uploads/1/3/1/4/131437364/ec587c0b.pdf
    • http://theinvisiblemomma.com/uploads/1/3/0/9/130968988/ziluremazuzeralugud.pdf
    • http://staceyanderic.us/uploads/1/3/0/5/130550752/porobijin.pdf
    • http://mta-sts.mail.acmechassisfactory.com/uploads/1/3/0/5/130551607/degozafali_mugavu_jigiperaf.pdf
    • http://jgmedia.blue/uploads/1/3/0/4/130476180/mexodal-pupeve-bozikupuxepomos.pdf
    • http://immobiliere-mastronicola-olivier.com/uploads/1/3/0/6/130640006/zufuzizopel_todakal_tavaviwazulix_netijewo.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_off00006539.bin
a3c93783ead02581a2430c0a13dd1bcffced20b2581a6dff05440d42875fdb42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 5156 bytes
font_01_sfnt_off0000767e.bin
b99249563bb823a4d524707f1319ccbec41ae8737837ebed0c28bfa376a351bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767E 10508 bytes

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