Malicious PDF — malware analysis report

Static analysis result for SHA-256 c235e0d5d8dab6e7…

MALICIOUS

PDF

73.6 KB Created: 2021-06-02 04:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dae5d904dfa9faa6fdbaf9e55fb8f42 SHA-1: 165ab69e2b398b81d06a23f8eebe0fef9dd46218 SHA-256: c235e0d5d8dab6e7e1ad35ff7e80b7409af72e1b51f694b5d46df04778e798d9
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, with one specifically pointing to 'dugedepap.ru', suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/123?utm_term=bbc+english+core+class+12+pdf
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/toravisajupara.pdf
    • https://zorelivuveromip.weebly.com/uploads/1/3/4/4/134438733/e5748e5387c.pdf
    • https://cdn-cms.f-static.net/uploads/4378171/normal_5fd61eac1df70.pdf
    • https://wokozizexufam.weebly.com/uploads/1/3/4/2/134234926/cf6eaf867.pdf
    • https://static.s123-cdn-static.com/uploads/4455883/normal_5fc9afa17cae7.pdf
    • https://tupeduwexawagov.weebly.com/uploads/1/3/1/6/131607208/fizapojewatagu-sotekidajemoper.pdf
    • https://vifesomojijafi.weebly.com/uploads/1/3/4/3/134337648/7346944.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bopelijexuf.pbworks.com/w/file/fetch/144464961/libro_mi_maestra_es_un_monstruo.pdf
    • https://uploads.strikinglycdn.com/files/3c598e03-4fe5-429b-ab78-61075e318a40/how_to_make_guppy_breed_faster.pdf
    • https://uploads.strikinglycdn.com/files/15eac605-b2b8-47b7-9116-c8459762032b/vodize.pdf
    • http://tejudafo.pbworks.com/w/file/fetch/144460059/verbs_quiz_for_grade_2.pdf
    • http://wefolevemud.pbworks.com/w/file/fetch/144480816/zetivojawusinuxub.pdf
    • http://xojifot.pbworks.com/f/gisokawigoneritexulula.pdf
    • https://uploads.strikinglycdn.com/files/bb095786-1952-4a05-acb3-a95463ca246a/grammar_practice_book_grade_6_answer_key.pdf
    • http://noxixap.pbworks.com/f/90649003688.pdf
    • https://uploads.strikinglycdn.com/files/cdf78213-8eef-4c4c-a01f-456a99350846/wadininedasezapasivebor.pdf
    • http://tarogifere.pbworks.com/w/file/fetch/144485595/vediroxixozerewedezined.pdf
    • http://gemometis.pbworks.com/w/file/fetch/144484020/22206455879.pdf
    • http://betosaxugawi.pbworks.com/f/boboxikawivuvoviligut.pdf
    • http://kunixove.pbworks.com/w/file/fetch/144483681/ps3_oyunlar_full_tek_link_indir.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e15b.bin
582bed46bed4f9b78c685015ce29b85ecf6cd74d534fc64368c9582aec619861		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE15B 5788 bytes
font_01_sfnt_off0000f50d.bin
06b2f054206af376840d000f9a7c6be00eee0b065c58d2aa3f221c2f59134d88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF50D 10640 bytes

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