Malicious PDF — malware analysis report

Static analysis result for SHA-256 178c41bbd0b264ee…

MALICIOUS

PDF

76.4 KB Created: 2021-03-09 01:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 6582b8e4603d8dbe9b4d1119b7e04166 SHA-1: 1d0de4c9d164c1699d7bb36a0906b8e316e1ee21 SHA-256: 178c41bbd0b264ee5d152e046204e1250b3b0a68fb69e4c1bea5c604d44d1f6a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is structured as a link farm, suggesting it's designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, contains metadata related to its creation, hinting at its purpose as a lure.

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://midufefew.ru/award?keyword=english+speaking+sentences+pdf+in+tamil PDF link annotation
    • https://muzafudopabebex.weebly.com/uploads/1/3/4/8/134865208/f66ed4832.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480387/normal_5ff6908061dea.pdfIn PDF document text
    • http://luxisulejoxo.getenjoyment.net/makkar_ielts_speaking_file.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473044/normal_603e88098c64b.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/how_to_reset_a_kenmore_dishwasher_665.pdfIn PDF document text
    • http://giwosoto.sportsontheweb.net/call_center_quality_assurance_training.pdfIn PDF document text
    • http://gefalugajorifa.iblogger.org/xelalasupofipizagutoz.pdfIn PDF document text
    • https://kobenavu.weebly.com/uploads/1/3/4/7/134714827/5843446.pdfIn PDF document text
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/b7f9bb069056a6.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/kagidumazixipukoj.pdfIn PDF document text
    • http://vivudanu.scienceontheweb.net/lady_macbeth_movie_2017_full_movie_free.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/40502071085.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466368/normal_5ff4228a32c84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464052/normal_60081ee7e4931.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383146/normal_5ff608eb264c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/72044165293.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/cryptic_crossword_answers_dan.pdfIn PDF document text
    • http://tesedep.rf.gd/47291992688.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/american_heart_association_guidelines_endocarditis_prophylaxis.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/gulumarivolumelitimowabaw.pdfIn PDF document text
    • http://kikujebi.epizy.com/the_hardy-_weinberg_equation_worksheet_answers_pogil.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/captive_prince_book_3_epub.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_off0000efe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE1 5492 bytes
SHA-256: 02e7335c58fbfe4dc6ac38f665cca4d6b188b959bc33068b3cbf5fd6e2a975cb
font_01_sfnt_off0001027d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027D 9964 bytes
SHA-256: f0205f91992c19453fffa27e252301ce53e52ecb486a27c9887555481797d08c

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