Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0cdd0eb94610fe…

MALICIOUS

PDF

52.9 KB Created: 2020-05-05 23:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d0e5414635690c52138f9d60051ffb4a SHA-1: e72c790edaa86be7d70804ff8f7fdd43f9327757 SHA-256: da0cdd0eb94610fe9dd580eb19647f8d1cf73d8335770d5ecb73356f698f8021
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. This suggests a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of numerous external URIs supports this assessment. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of specific user lures.

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://ctostevin.com/uploads/1/3/0/7/130776674/130776674.html#abba+money+money+money+sheet+music+pdf
    • http://jewelzcollection.com/uploads/1/3/0/7/130739970/3753394.pdf
    • http://askjj.org/uploads/1/3/1/3/131398091/2337951.pdf
    • http://austinmetalroofers.com/uploads/1/3/0/5/130539408/bilinapug_zosok_vifoj.pdf
    • http://creativemindsa2z.shop/uploads/1/3/1/4/131406146/mugujurejuk.pdf
    • http://richardandfamous.com/uploads/1/3/1/3/131382680/navawubeziviza-vumudosafan-rulikuboxemiloz.pdf
    • http://perfectyourcraft.studio/uploads/1/3/0/5/130589216/5371637.pdf
    • http://freemind427.com/uploads/1/3/1/3/131380944/e868bf783dfce8.pdf
    • http://drsbernerandburesh.com/uploads/1/3/1/3/131381046/7251727.pdf
    • http://bgrahamfarrier.com/uploads/1/3/0/9/130969229/2e056798b5543bc.pdf
    • http://theorilayers.com/uploads/1/3/0/7/130775985/bfcb9.pdf
    • http://hudsondayscarshow.com/uploads/1/3/1/0/131071175/felijux.pdf
    • http://wehmannconstructioninc.net/uploads/1/3/0/6/130605153/7048998.pdf
    • http://prisonlifeline.net/uploads/1/3/0/8/130874610/towuvumar.pdf
    • http://gritngravel.com/uploads/1/3/0/4/130483820/jeduwe_wetebepume_faditefe_kediwununoba.pdf
    • http://drumeffect.com/uploads/1/3/0/6/130621213/2281870.pdf
    • http://anartsylife.com/uploads/1/3/1/4/131438510/f10f0f.pdf
    • http://onealtv.com/uploads/1/3/0/5/130588693/gademimu_vadewewil.pdf
    • http://youarenotalone-yana.com/uploads/1/3/1/6/131606366/momesodajo.pdf
    • http://dataconflict.blog/uploads/1/3/1/8/131856095/bowejovomiga.pdf
    • http://livs.xyz/uploads/1/3/0/7/130739023/930864.pdf
    • http://gemalchemist.com/uploads/1/3/0/4/130476586/kapezaxosamigit-goges-datupevufubo-zirebudilu.pdf
    • http://pintanbastos.net/uploads/1/3/0/3/130379902/faruped-nasab.pdf
    • http://aofcorp.com/uploads/1/3/0/6/130605369/sukoxikexaxebepopi.pdf
    • http://cliniquesdentairesuisse.ch/uploads/1/3/0/3/130313612/tidoliwofu-tovesozebivop-sesurikanupe.pdf
    • http://richardandfamous.com/uploads/1/3/1/3/
    • 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_off00009c96.bin
5abe4b21df7cadcb0812bad254ef702228e99c614d917c2159a95337f43f5427		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C96 13200 bytes

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