Malicious PDF — malware analysis report

Static analysis result for SHA-256 075f1594743aa8f2…

MALICIOUS

PDF

87.4 KB Created: 2021-06-11 03:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3d2718ed43d8f0e02c351f47cdce34e7 SHA-1: cbde622e7031a5ef5c8f9927ccbde2e541c69801 SHA-256: 075f1594743aa8f22db5b87bda3a53ae6d4cd5420f76bd5548d9d519b6edee2d
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=telephone+answering+service+near+me PDF link annotation
    • https://ropojagininu.weebly.com/uploads/1/3/4/6/134635708/d615bb007acb8a.pdfIn PDF document text
    • https://juwopivevonu.weebly.com/uploads/1/3/4/6/134682880/zimemupodafa.pdfIn PDF document text
    • https://fovinerorowabas.weebly.com/uploads/1/3/2/6/132682717/noveg_jakef_bewew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_600ae557a00c6.pdfIn PDF document text
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/2791184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_600d0b9cb4d29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470205/normal_60bd7668ee0ac.pdfIn PDF document text
    • https://sipemesiga.weebly.com/uploads/1/3/4/0/134095973/gobotisijeretewaja.pdfIn PDF document text
    • https://dodikajopofibu.weebly.com/uploads/1/3/4/7/134704264/c0ec9b1579187.pdfIn PDF document text
    • https://toxedozopofezi.weebly.com/uploads/1/3/1/4/131453782/8409369.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vafobotigef.pbworks.com/f/ccna_routing_and_switching_step_by_step_lab_exercises.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/w/file/fetch/144883470/50080827876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21abdc5-2e8e-48cb-9d21-acb7edda8026/lejavuterobogumanux.pdfIn PDF document text
    • http://nugurafuge.pbworks.com/f/45544426865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf421d5-03fd-4a9b-a29d-e57d2cd750cd/xojinoxadunujozegutonogo.pdfIn PDF document text
    • http://zigunef.pbworks.com/f/jijivarilojotaze.pdfIn PDF document text
    • http://beratirupo.pbworks.com/w/file/fetch/144663018/ejercicios_adjetivos_posesivos_en_francs.pdfIn PDF document text
    • http://xavewop.pbworks.com/f/nobimojazesurezopofaban.pdfIn PDF document text
    • http://fudejob.pbworks.com/f/pepevikaxosudawumevar.pdfIn PDF document text
    • http://sejuworepow.pbworks.com/w/file/fetch/144564501/kanepas.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/wii_gamecube_games_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A59 5156 bytes
SHA-256: f26013a5c9153e1cc8866b85077da7735a302a132a48056440f8442a51d297dd
font_01_sfnt_off00011bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBC 11196 bytes
SHA-256: 433a6b1a597d41f37b006faf04f08c4eaab248166574bf73024e53a795d1bd55
font_02_sfnt_off00014225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14225 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3