Malicious PDF — malware analysis report

Static analysis result for SHA-256 f040545cae4a5005…

MALICIOUS

PDF

71.7 KB Created: 2021-02-28 22:50:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bad6649f3b5303709c6a53f553c90e5 SHA-1: 0dfd06e147a239784d00653da347ee50c32a072f SHA-256: f040545cae4a50058c5f18bb5b9654452f2cbbcf81d85b971ee706bf91282a5b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing. The embedded URL 'https://mezovuduw.ru/award?keyword=xbox+360+controller+not+connecting+to+pc+wired' suggests a lure related to search engine optimization or a fake award, aiming to trick users into clicking malicious links. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://mezovuduw.ru/award?keyword=xbox+360+controller+not+connecting+to+pc+wired
    • https://cdn-cms.f-static.net/uploads/4386337/normal_601794b5e29c3.pdf
    • http://kejoxemubogese.mywebcommunity.org/dabogepafekumusime.pdf
    • http://sesopuligu.iblogger.org/blues_music_playlist.pdf
    • https://jiludagurifo.weebly.com/uploads/1/3/4/3/134349737/dipizata.pdf
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/6406849.pdf
    • https://cdn.sqhk.co/fujikapoji/iaggT7j/sawusokupoduvukonif.pdf
    • https://cdn.sqhk.co/resozasevej/DgjXgei/ironheart_canning_company.pdf
    • https://nogigeto.weebly.com/uploads/1/3/4/6/134665346/geped.pdf
    • https://cdn-cms.f-static.net/uploads/4370264/normal_60147e4a939b3.pdf
    • https://cdn.sqhk.co/zokelofid/ihjbjcv/75329141249.pdf
    • https://voloripilobolim.weebly.com/uploads/1/3/4/6/134635915/5a4a763a5124ed1.pdf
    • https://zaluzukefajol.weebly.com/uploads/1/3/5/4/135400247/6057683.pdf
    • https://fasilusizewolas.weebly.com/uploads/1/3/5/3/135313848/2a04cb7525.pdf
    • https://nurojitare.weebly.com/uploads/1/3/2/6/132682966/rinodud-furogu-fifanimugo-feganuselerixid.pdf
    • https://static.s123-cdn-static.com/uploads/4372086/normal_5ff21e702ba24.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc3b.bin
d70f50c4a1402f0388a4552c48f871d84a3b54aff5dd44b8a79959a0d362e446
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3B 5592 bytes
font_01_sfnt_off0000ef62.bin
1dc840c54ef818ffe252989ce16a07ccbc82567fc83c715d1c251e5a9d95c571
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF62 10044 bytes