Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e7ff5cfd7bf695…

MALICIOUS

PDF

66.9 KB Created: 2020-11-25 13:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 466e907161a4171d6fbdd39eb911cefe SHA-1: d9bae42f0f325b1d0c012be13469279997e54b39 SHA-256: 26e7ff5cfd7bf6950b7e44d1516f745344c7e6bdd47c6b99abd6ff61c1277312
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for phishing or SEO spam. The primary URL, traffset.ru, is likely used to redirect the user to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://traffset.ru/strik?utm_term=the+lord+of+the+flies+sparknotes+chapter+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413239/normal_5f955622a6eaa.pdfIn PDF document text
    • https://vedabigejiko.weebly.com/uploads/1/3/1/4/131438046/fiterubamidos-nefunis-wumazezoze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404983/normal_5fa61d749c528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f898b27d144c.pdfIn PDF document text
    • https://niwubeleligijoz.weebly.com/uploads/1/3/4/7/134764474/7824206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f925c0cb77cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f8c9be8c9a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387703/normal_5f97cc9a8ecba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_5fbb13a836653.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/7033143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_5f94d1ad15065.pdfIn PDF document text
    • https://riwetomawojok.weebly.com/uploads/1/3/4/5/134516188/povapikuroko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafdab5f-5e58-4228-9516-477a17cdf38e/88475786187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8617bb25-5e2f-435b-8659-255fc54cefc0/hebe_tien_a_little_happiness_mp3.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/suvedonejulubov.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF4 5308 bytes
SHA-256: 8f8416529ca1a7d392db3e965e6a8ae6b12f9e3b777fa33e68df1740b7baf09c
font_01_sfnt_off0000ddff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFF 9648 bytes
SHA-256: 539a6394dc60f0b13c7799055017ad9b0e4163f6468ba1d28b0bb8e2dce88d1e

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