Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fef78dfa17addd…

MALICIOUS

PDF

70.3 KB Created: 2021-03-09 11:44:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4179e08d042fc98debc0c163b49751a8 SHA-1: a8a488a89185f675abe61a06894966e9c11c9dc2 SHA-256: 98fef78dfa17adddc72ef17e74967744b130dfd00fe28a56621529757899fa7c
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, many pointing to disposable hosting and potentially malicious domains, suggesting a phishing or credential harvesting campaign. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support this attack pattern.

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://jumiwimov.ru/wix?keyword=adintrend+thai+pbs PDF link annotation
    • https://jefiwoso.weebly.com/uploads/1/3/5/9/135996081/5391339.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/sex_drugs_and_cocoa_puffs_by_chuck_klosterman.pdfIn PDF document text
    • http://vinnipoh.space/sanico_inc_binghamton_nycssl2.pdfIn PDF document text
    • https://wivaralizufijol.weebly.com/uploads/1/3/1/4/131483386/tozodum.pdfIn PDF document text
    • https://sowuritujozefa.weebly.com/uploads/1/3/4/6/134621612/e9f0ec26.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/8249534076w1noz.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/monokilorokalovarawetapu.pdfIn PDF document text
    • https://tazumeter.weebly.com/uploads/1/3/1/4/131438167/xixexirijulok-tuwesu-kokobapepigub-lelubudodup.pdfIn PDF document text
    • http://savineme.mywebcommunity.org/how_long_does_a_honda_7000_generator_last.pdfIn PDF document text
    • http://fulukegoror.getenjoyment.net/blackjack_rules_seven_cards.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/vtech_cs6429-4_manual.pdfIn PDF document text
    • https://kukibutojiw.weebly.com/uploads/1/3/0/7/130775835/rifudiw.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/kezetutefemazarev.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/vehicle_inspection_report_for_insurance.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
    • http://mupopeseri.rf.gd/international_phonetic_alphabet_english_words.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/tasajukexabubo.pdfIn PDF document text
    • http://boripodadup.epizy.com/vinowiwituwadagegozisiliz.pdfIn PDF document text
    • http://kobuxotaregudes.rf.gd/jolly_phonics_pupil_books.pdfIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/honda_harmony_1011_deck_belt_size.pdfIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/is_epic_software_hard_to_learn.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 5

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_off0000c97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97D 4824 bytes
SHA-256: 81b69537acca093988aedbe409bdf33f40afc63d4b0c0c261bf45f61978c2ae2
font_01_sfnt_off0000d9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B6 10536 bytes
SHA-256: f1c43a35e5f74ad8f56b40e8d6e5a9f52ababe320bbe24437c40c314f0abc95b
font_02_sfnt_off0000fdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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