Malicious PDF — malware analysis report

Static analysis result for SHA-256 74667b0d113bf59d…

MALICIOUS

PDF

66.6 KB Created: 2021-03-10 20:58:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cf0b7ffa089e8102307ccd79833b266 SHA-1: 21e3058c0d6037585599f2f3d5e44c0e71c879a5 SHA-256: 74667b0d113bf59dfc12244a5f76b1caf419deedc30fc1f197cc096ea14a6290
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 phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to create a link farm or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=sony+wega+engine+tv+manual
    • https://static.s123-cdn-static.com/uploads/4419423/normal_5fcee684e0741.pdf
    • https://cdn-cms.f-static.net/uploads/4379605/normal_601b504e6caa6.pdf
    • https://cdn-cms.f-static.net/uploads/4382407/normal_60451423e6b45.pdf
    • https://nimimetifav.weebly.com/uploads/1/3/2/8/132814674/gixufarer-videbuzovuben-puzinugubara.pdf
    • https://gepidoduxaw.weebly.com/uploads/1/3/5/3/135324144/kaditakizaxafa.pdf
    • https://static.s123-cdn-static.com/uploads/4419828/normal_5ff9a71c568f4.pdf
    • https://cdn-cms.f-static.net/uploads/4467561/normal_6027cf7418fe0.pdf
    • https://cdn-cms.f-static.net/uploads/4410204/normal_6009d4a3355ad.pdf
    • https://cdn-cms.f-static.net/uploads/4460950/normal_5fd8843d9eb29.pdf
    • http://nijeratazuw.iblogger.org/cuantos_medios_de_comunicacin_en_el_salvador.pdf
    • https://cdn-cms.f-static.net/uploads/4453551/normal_602eff740b95d.pdf
    • https://rugibabolunape.weebly.com/uploads/1/3/1/4/131454120/bozupujiwogo-noleneke.pdf
    • https://static.s123-cdn-static.com/uploads/4469378/normal_5fcd87d0566ba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kakoxoduruze.epizy.com/42543566728.pdf
    • http://moganip.epizy.com/62647324412.pdf
    • http://nopuxawox.epizy.com/rexegizur.pdf
    • http://xabenigirujufoz.epizy.com/xidegemoto.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c942.bin
3fd76e01591cc01ff85b49451a6b0287be0337d5cb854d11e22048f661bd1132
pdf-font-stream PDF embedded font (sfnt) at offset 0xC942 5088 bytes
font_01_sfnt_off0000daa5.bin
5cf46def4bdd913f1c6d07aa32e7c04b10009074aae6bc6b065cbe143b73f2ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA5 10320 bytes