Malicious PDF — malware analysis report

Static analysis result for SHA-256 15afc17031337b26…

MALICIOUS

PDF

81.1 KB Created: 2021-03-04 22:23:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0f458afb69a5853374c2e1206ead1a11 SHA-1: e78f110f940a295d678b36413d5956a5688a281d SHA-256: 15afc17031337b269d6d0901126e693e23f5169608f8982894b70f49e9fa7daf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware delivery attempt. The document body contains a deceptive lure related to 'Martin Luther 95 theses most important', which redirects to a suspicious URL. The presence of numerous external URIs and link farm heuristics further supports a malicious intent to redirect users to potentially harmful sites.

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://jacksth.ru/aws?utm_term=martin+luther+95+theses+most+important PDF link annotation
    • http://wuvijenebomukib.iblogger.org/54141901851.pdfIn PDF document text
    • https://cdn.sqhk.co/bedipidis/dsrXqha/iphone_music_player_for_android_apk_download.pdfIn PDF document text
    • http://trokot-newshop.online/free_letter_formation_worksheets_a-_z2xgjw.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/egdvPXH/luwevakulitime.pdfIn PDF document text
    • http://maliwalilaz.22web.org/how_much_money_do_reiki_masters_make.pdfIn PDF document text
    • http://erogan24.website/diagramming_sentences_worksheets_5th_gradevh7h4.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/how_to_reschedule_dmv_appointment.pdfIn PDF document text
    • http://helpforteam.com/vuganavilovizaxonkeqgk.pdfIn PDF document text
    • http://begemotiks.space/zasilagilugujirwjp5c.pdfIn PDF document text
    • https://cdn.sqhk.co/futogifoku/iGvjlIy/daxasopemesesuv.pdfIn PDF document text
    • http://vizexibidoxi.getenjoyment.net/zovufafi.pdfIn PDF document text
    • http://xutexukoxobofi.mywebcommunity.org/kenmore_front_load_washer_error_code_f17.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/hihhhhi/pomokorebe.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/a495c3f6-ae9f-4dc2-abd1-a4639630cc6a/what_causes_white_smoke_on_a_diesel_engine.pdfIn PDF document text
    • http://kojuvurapamox.myartsonline.com/gekitemamimiwunowew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec225572-0ecf-4bef-b8f8-2b7a63164ea6/snow_whitening_class_action_lawsuit.pdfIn PDF document text
    • http://tozoxuzev.epizy.com/diet_challenge_30_days.pdfIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/hearts_of_iron_3_black_ice_unit_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF477 5228 bytes
SHA-256: 2489f31b576de3ac720447380574e4a54167386309418ac59150adf5bf9f8e9a
font_01_sfnt_off00010608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10608 10176 bytes
SHA-256: 70ebad2ca5183adaec0c5b493ae3d113e97f050c95bdc28f1eb05dc736a1f611
font_02_sfnt_off00012895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12895 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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