Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecab6e21f2747845…

MALICIOUS

PDF

93.8 KB Created: 2021-04-23 04:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9a261a73c3a268ee01c939a2b9c8e3d8 SHA-1: daa60fb39ca47de7e8065e332d7756866a413799 SHA-256: ecab6e21f2747845a937336c6200e8c61cb16bcdebec8e314db2db8338d16995
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of many external links and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest the document's primary purpose is to redirect users to malicious content.

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 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://golowaki.ru/strik?utm_term=list+of+irregular+verbs+pdf+with+spanish+definition PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470211/normal_6005e8dbce7d3.pdfIn PDF document text
    • https://jagojepenita.weebly.com/uploads/1/3/0/7/130739472/lopodumagakavig_pazagelaja_tuluxodovenog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485580/normal_5fd1e1b9c8d29.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/if37zte/art_therapy_degree_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/yDrggha/bezojapipanezopef.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/a9tNfjb/judgement_night_cast.pdfIn PDF document text
    • https://zukafetovozod.weebly.com/uploads/1/3/1/6/131636890/wobakaboguponi.pdfIn PDF document text
    • http://tikopariwoxa.mygamesonline.org/jobajawamigorifinura.pdfIn PDF document text
    • https://xakijugikirire.weebly.com/uploads/1/3/1/4/131437514/kedivinulima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463565/normal_6023b84db1183.pdfIn PDF document text
    • https://sitadubudotewor.weebly.com/uploads/1/3/5/3/135335426/pozelisobow_zasaganipub.pdfIn PDF document text
    • http://gimemuwet.mypressonline.com/libapomasegibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420743/normal_6023562f39640.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pupowelepidojek.onlinewebshop.net/basic_afrikaans_phrases.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/ziravukesuxolivagebopido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b0ccde7-f9ee-49b4-9184-fd0a07b8b30c/ruzeniram.pdfIn PDF document text
    • http://jusopetikikij.onlinewebshop.net/treaty_of_guadalupe_hidalgo.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/42452572228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81bd2cb5-04db-40fc-be44-54c6eb6c9d2c/34351214838.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/koala_information_sheet.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_off00012c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C37 5536 bytes
SHA-256: 4f39962feec6c77310044292bf120549e2064bd1dde203c7c0427580a942bf22
font_01_sfnt_off00013f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1A 13088 bytes
SHA-256: 3f4b410626bda4468fa8e6366ecf97a35d8a510914f9e9b0d85b8a2e1de7470b

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