Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b86f0a146d54b7…

MALICIOUS

PDF

47.4 KB Created: 2020-03-26 11:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dab3dac217cee9fd352a05d1a37507a0 SHA-1: 4c94f867a42ebfa88fb59662e5a9d0dab59b1f93 SHA-256: 13b86f0a146d54b73541040a3f8c25801115b29eff0a2f9658e0854e97528f0d
136 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO manipulation tactic. The presence of 'cmd.com' in the document text, alongside numerous URLs, indicates a potential attempt to leverage these links for malicious purposes, possibly to download and execute further payloads. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://fwtrail.org/uploads/1/3/0/2/130272377/130272377.html#2017+chevy+volt+premier+review
    • http://elouyoga.com/uploads/1/3/1/1/131164278/3988920.pdf
    • http://prismconsultingservices.net/uploads/1/3/0/2/130272481/nagizutubokejejug.pdf
    • http://dorsetheartdoctor.com/uploads/1/3/0/6/130604145/8488171.pdf
    • http://pepay.host/uploads/1/3/0/4/130489841/xamotinodo.pdf
    • http://mail.pathwaysretreat.org/uploads/1/3/0/6/130605369/nilujes_lapuwizodorumi_pupavatidako_gituduxelubi.pdf
    • http://deanirious.com/uploads/1/3/0/2/130288630/2711150.pdf
    • http://lyvd.net/uploads/1/3/0/9/130969834/besov-tavoxovu-fojawowol.pdf
    • http://renatoprado.net/uploads/1/3/0/7/130776520/nebegavuroxa.pdf
    • http://biancasglobaltravels.com/uploads/1/3/0/8/130874278/1991324.pdf
    • http://www.hellosydneytravel.com/uploads/1/3/0/8/130874328/dejotopexenur.pdf
    • http://www.chapter6.americansingercanary.com/uploads/1/3/0/9/130969699/rupofa.pdf
    • http://michaelroll.net/uploads/1/3/0/6/130603737/5510920.pdf
    • http://organik-zeytinyaglari.com/uploads/1/3/0/6/130639983/4477775.pdf
    • http://spccmd.com/uploads/1/3/0/6/130639051/848bee6a.pdf
    • http://ircreads.org/uploads/1/3/0/4/130436285/galuv.pdf
    • http://burnsbluff.com/uploads/1/3/0/8/130873918/lezim.pdf
    • http://donseverns.com/uploads/1/3/0/6/130639418/6661303.pdf
    • http://winchesterbridalbarnexpo.com/uploads/1/3/0/9/130969360/paxuj-tamitus-ruvojam-xipagox.pdf
    • http://luxuryrealestatelongbeach.com/uploads/1/3/0/5/130550754/xutewijorer.pdf
    • http://tamparockbands.com/uploads/1/3/0/5/130545396/xilujoz.pdf
    • http://neilredcliffe.com/uploads/1/3/0/7/130739860/vomezar.pdf
    • http://motorcityracing.shop/uploads/1/3/1/1/131164128/9407877.pdf
    • http://sams1861.net/uploads/1/3/0/5/130588468/2089175.pdf
    • http://lendellblack.net/uploads/1/3/0/2/130289415/vomisekoxelaji_vofuroz.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_off00008eaf.bin
aadac7586f9ee07ba40af01ff8c8a5f2f3eacc2912474d46a4b3ea1219faedb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAF 8632 bytes

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