Malicious PDF — malware analysis report

Static analysis result for SHA-256 46159959d4ceb54e…

MALICIOUS

PDF

84.2 KB Created: 2021-03-17 05:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fbc3bf0d26315b05e6887edb27768a12 SHA-1: d8c4d99fc0a04593e2e9ebfdc3e72cc71ed17760 SHA-256: 46159959d4ceb54e23b14ec6840f820cceb864478dc3e5c2e0fc04540882f8ac
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'dugedepap.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The document body, though heavily obfuscated, appears to be related to search terms for educational materials, suggesting a lure to trick users into visiting the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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://dugedepap.ru/award?keyword=faktorisieren+binomische+formeln+%25C3%25BCbungen+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482207/normal_602a0a8bb5efb.pdfIn PDF document text
    • https://cdn.sqhk.co/lasumalena/WE1TZia/35957737960.pdfIn PDF document text
    • https://doxagazezuzizum.weebly.com/uploads/1/3/1/6/131606815/2411979.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/khhgyhj/74450519859.pdfIn PDF document text
    • https://cdn.sqhk.co/bomenojosa/rgfjchd/rebel_racing_hack_revealed.pdfIn PDF document text
    • http://topplafond.xyz/mugosajexv7a1j.pdfIn PDF document text
    • http://zathkatow.xyz/9114707055sdg2b.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/ruzurobedasu.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/1d9a1.pdfIn PDF document text
    • http://eagleaff.com/13462922351vvcti.pdfIn PDF document text
    • http://aydym.club/levutiberorixuxidqhg5j.pdfIn PDF document text
    • https://cdn.sqhk.co/rizakumer/je0jchh/55070760870.pdfIn PDF document text
    • https://povoxiguda.weebly.com/uploads/1/3/4/0/134016665/rijerar_wesokoretum.pdfIn PDF document text
    • https://nodararikerat.weebly.com/uploads/1/3/4/8/134885074/c04642f8d723.pdfIn PDF document text
    • https://cdn.sqhk.co/riwewazisara/ihdeDjh/chuck_tv_series_season_4_free.pdfIn PDF document text
    • http://formblckr1.xyz/kazejibu9afso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466135/normal_603ff92ee1a2f.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
    • https://uploads.strikinglycdn.com/files/91bbb00f-a69f-4cec-bd99-83f7b19e6106/38537474380.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/33071389290.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/goxekotesuxewaban.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff26e5d6-42ef-4c56-890e-7e7e00c3234c/how_to_write_teamwork_in_appraisal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09601da-cd50-4fc9-af34-dd56b5f57ba6/jogeximanulab.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/how_to_remove_safewatch_pro_3000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb0a845-3f4e-4e8e-874c-f8573a47bbfc/rolemorubodipupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5870012b-675c-4233-a980-92fb9599665f/holy_quran_book_with_urdu_translation.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_off0000f631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF631 5728 bytes
SHA-256: 91f4787a3c934bf6878346f711ce24e17980b8b331ab33055e9451ace9c053ab
font_01_sfnt_off00010948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10948 12412 bytes
SHA-256: d0dcc2b2e21aa8e8d6e57ca0b13d1d510b36d8875df81dc543aa3830d14de394
font_02_sfnt_off00013240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13240 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34