Malicious PDF — malware analysis report

Static analysis result for SHA-256 309bae90d275636c…

MALICIOUS

PDF

36.7 KB Created: 2020-06-04 20:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c7277aead166a2d262f9746d7b9d70b SHA-1: 3c024bd6f6ce5687d089ce1469eb377c1be81b5a SHA-256: 309bae90d275636c9af839839839bd4807a91a93a21fc8f064dffd0a133e2ea0
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 numerically or generically named, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to potentially malicious external sites via these numerous links.

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://mbcouriers.net/uploads/1/3/1/4/131438876/131438876.html#how+many+shots+in+750ml
    • http://patientidspecialists.com/uploads/1/3/0/6/130620892/0a56a.pdf
    • http://lizrevisray.com/uploads/1/3/1/4/131454733/0bf64.pdf
    • http://lorandinc.net/uploads/1/3/0/4/130476272/750267d391ae64.pdf
    • http://pilatesforeverybody.net/uploads/1/3/0/4/130483566/nuteritis_vumetetijola_rapivafi.pdf
    • http://anatomyfinalproject.com/uploads/1/3/0/7/130740391/2230076.pdf
    • http://tymboslycebeats.com/uploads/1/3/0/6/130621533/repotakunameraxojek.pdf
    • http://johnsonlimousine.com/uploads/1/3/0/6/130621279/7130361.pdf
    • http://tank-insurance.com/uploads/1/3/0/2/130289282/zotusibaxifapot.pdf
    • http://danielgeu.com/uploads/1/3/0/3/130313286/nedofegoginegik_xozeginu.pdf
    • http://yetrecovery.com/uploads/1/3/0/9/130969763/a9167e205.pdf
    • http://soultivity.net/uploads/1/3/2/3/132302960/nitiberuguzomoduko.pdf
    • http://rajaseks.org/uploads/1/3/1/4/131406258/fizubaxeb-sawinekamikan.pdf
    • http://thesafeway.online/uploads/1/3/0/6/130604552/jisaxe-fanaxobalijeget-demidepodib-texilegivov.pdf
    • http://mbcouriers.net/uploads/1/3/1/4/131438876/terms.html
    • http://mbcouriers.net/uploads/1/3/1/4/131438876/dmca.html
    • http://mbcouriers.net/uploads/1/3/1/4/131438876/policy.html
    • https://gonaburezi.files.wordpress.com/2020/06/3489494225.pdf
    • https://gufakiv.files.wordpress.com/2020/06/juvivulobobebosivo.pdf
    • https://gijaxipu.files.wordpress.com/2020/06/gigobujuzoparipuwopirilo.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_off000063b9.bin
640ee22c262f23699b5ff8f9a1f64fadcaf758e8feb02c506daaec08193e362b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B9 10728 bytes

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