Malicious PDF — malware analysis report

Static analysis result for SHA-256 29244ea042cd033e…

MALICIOUS

PDF

77.4 KB Created: 2021-04-14 00:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e6808056733882b09e4d5fdcadcfdf62 SHA-1: 0b305f629c4b5e7b76f17cdcbf4dda4a0a183cb1 SHA-256: 29244ea042cd033ef40322bc4653bb77a23347dd41e00252bdcbe3f7b27fc3a6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, containing numerous embedded URLs. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of these links leading to phishing or malware distribution sites. While no scripts were explicitly extracted, the structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/strik?utm_term=2018+ford+mustang+ecoboost+premium+owner%2527s+manual PDF link annotation
    • https://revunipaletofux.weebly.com/uploads/1/3/0/8/130874393/4477219.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/wedukunawuguna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410432/normal_5ff0b466000ce.pdfIn PDF document text
    • http://ladekepevij.mygamesonline.org/how_to_make_a_cheap_wood_splitter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_603ead1e564d8.pdfIn PDF document text
    • https://cdn.sqhk.co/kefofepobam/hmghhgN/guru_graha_stotram_in_telugu.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/atmospheric_pollution.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_602283de9e49e.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/kalawedidulabutosoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/jozazixefuf/gi4d1QW/73101807271.pdfIn PDF document text
    • https://pafutidosuzov.weebly.com/uploads/1/3/5/9/135989867/b12ae8a77cc54f1.pdfIn PDF document text
    • https://dodaxopaz.weebly.com/uploads/1/3/4/8/134865523/bemurazakonudole.pdfIn PDF document text
    • https://cdn.sqhk.co/rawatajizefu/dPghigJ/baked_cod_recipe_panko_parmesan.pdfIn PDF document text
    • http://xukosususif.medianewsonline.com/sewujetabodilana.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/Hc8dggN/class_valuation_appraisal_phone_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416656/normal_6018af04bc790.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484380/normal_5fcd6f911cf4a.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/63092730744.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/69bc4f92-9f4a-4709-8f78-963e4f306d9d/pidemuvakiw.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/minolta_mn35z_battery_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa864ba-1fe8-46bd-9bc8-eeaf5407d01e/nasepobaxutinanodafaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05366dd-aea0-4a04-9133-7fab049fa974/skyrim_mods_not_working_xbox_one.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_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 6168 bytes
SHA-256: 3e858374ece656d951089a124b97801151519b9e91e29d6ed1d47bc354c7c57e
font_01_sfnt_off000102bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BD 10880 bytes
SHA-256: f71047d8cbc77acdc964af28c8312dd212ff728c576f2b14e8c0f2d4cf79a84e

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