Malicious PDF — malware analysis report

Static analysis result for SHA-256 e296f415e2918efe…

MALICIOUS

PDF

74.3 KB Created: 2021-06-02 00:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d20b4953c69be290abff834494c1a19b SHA-1: 65fe926d85049520bd8721c43849d6142ba4ca82 SHA-256: e296f415e2918efe70267e73f353240cff0fc8529b88bb05580c13e2e66ded66
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ketchas.ru/pbw?utm_term=maths+activity+worksheets+for+grade+1+cbse PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468836/normal_5ff3f7ed70f66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376858/normal_5fe1694821c95.pdfIn PDF document text
    • https://kimonasisu.weebly.com/uploads/1/3/5/4/135400987/01eaeb3631dcfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418199/normal_6011af220caea.pdfIn PDF document text
    • https://bitebizato.weebly.com/uploads/1/3/4/5/134583528/napisu.pdfIn PDF document text
    • https://ruzisatof.weebly.com/uploads/1/3/4/7/134734885/5404145.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/gugipera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_60271b404787e.pdfIn PDF document text
    • https://ruzejeparofilag.weebly.com/uploads/1/3/4/5/134582671/817979.pdfIn PDF document text
    • https://tedatigajixa.weebly.com/uploads/1/3/0/7/130739480/kokogusonexe.pdfIn PDF document text
    • https://sexaxekeka.weebly.com/uploads/1/3/5/3/135313825/gipoduvux.pdfIn PDF document text
    • https://zapedasavuk.weebly.com/uploads/1/3/7/5/137512880/vikibuzodi-fenawinumuka-zenudanavezu-rafenozowopip.pdfIn PDF document text
    • https://fotelixufigowex.weebly.com/uploads/1/3/1/0/131071188/33a2c889d438.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://padimagofo.pbworks.com/w/file/fetch/144481011/32120699242.pdfIn PDF document text
    • http://pitevaj.pbworks.com/f/52925819865.pdfIn PDF document text
    • http://mukibilevejo.pbworks.com/w/file/fetch/144480990/3866456402.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/f/pojokogelitumowufetakafuw.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/w/file/fetch/144476592/hack_skin_mobile_legends_2021_ios.pdfIn PDF document text
    • http://pimepovume.pbworks.com/f/hazard_identification_and_risk_assessment_template_for_hospitals.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/f/does_dynamic_tension_really_work.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/where_to_take_cars_for_simeon_gta_online.pdfIn PDF document text
    • http://padimagofo.pbworks.com/f/63040359750.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144424557/coordinate_plane_word_problems_worksheets.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_off0000e436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE436 5768 bytes
SHA-256: adaeb2bfaaab50b76ed1bd921315ee24a6ddd501f1596658d4d57cd9989f4337
font_01_sfnt_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 10356 bytes
SHA-256: c41c483ee38bb877548dddb41f4b30decd02505b360af5f02803f083493b6afe