Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed74de3ae06f492…

MALICIOUS

PDF

76.8 KB Created: 2021-03-15 05:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 97bc896c0915a1bada9365c58195cc20 SHA-1: 1b9ed475f97eb7d1b7bb741d89038e2fe6f6cea1 SHA-256: 6ed74de3ae06f492d41408b95bc531220ca62e454ab3d0c9d1428d2d60f25361
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 of which are hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or scamming operations. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to attacker-controlled infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://ponafet.ru/strik?utm_term=what+to+do+when+you%2527re+miserable+in+your+relationship PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449395/normal_5fdbe0f05d915.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/6129257.pdfIn PDF document text
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/693b096b0b0.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/1947a11bd9324e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476590/normal_5ff2bd892bb56.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/J6iaijk/ms_project_management_software_free_download_2013.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/ifgcdia/tabletop_simulator_warhammer_40k_discord.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/djgemjj/4744858792.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408718/normal_5fe2a48c14f0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_600ea9bfd20a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446497/normal_5ff13a2899dfc.pdfIn PDF document text
    • https://cdn.sqhk.co/lunexubafexo/gjpiajg/deckeleven_s_railroads_2_mission_9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446026/normal_6013dbc5cbfa9.pdfIn PDF document text
    • https://mazefitarunakur.weebly.com/uploads/1/3/1/4/131453858/kejimej.pdfIn PDF document text
    • https://kajavowonedefa.weebly.com/uploads/1/3/4/8/134858644/462b15fcda082.pdfIn PDF document text
    • https://ladolijid.weebly.com/uploads/1/3/2/8/132816107/dakuruv.pdfIn PDF document text
    • https://tesegedoveveda.weebly.com/uploads/1/3/4/8/134891870/e0de1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496815/normal_60063279e3989.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewejav/19p5NVo/kogobujagafer.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/VjeiaO4/paypal_money_adder_app_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417419/normal_5fe44693044e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDF 5580 bytes
SHA-256: 30810ad58f3ed269f47e2091588806f649442d3663752b7c9c5dc5847b9e2ffa
font_01_sfnt_off000100cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CB 11184 bytes
SHA-256: 7ba7a4fa2fc56a40adb7140995cf13bc83a6a1a3847092ff2c8fea8f6420042f