Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e63294a7e69cae5…

MALICIOUS

PDF

99.7 KB Created: 2021-03-19 17:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30f35f56087cd492e89c58cf763cdaee SHA-1: e76490a571257852e0290a9c5a9df494472dab8f SHA-256: 0e63294a7e69cae5d1bbf5f5d0703bc97a933109a04b8249c9905a822d3f0439
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm designed to direct users to other malicious PDFs. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content, aligning with phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/123?utm_term=bipap+harmony+service+manual
    • https://wapojopaboxijok.weebly.com/uploads/1/3/4/7/134747084/nogexoguri_mipeduvonebova.pdf
    • http://snail-case.store/jesurivuwenofoveko8dwrn.pdf
    • https://cdn.sqhk.co/vokalater/heIwJij/ice_cream_roll_machine_ebay.pdf
    • http://matemepujibad.scienceontheweb.net/42983919150.pdf
    • http://wodedutipif.medianewsonline.com/ladorupupojidilan.pdf
    • https://cdn.sqhk.co/mixaluwekitu/ih3Ggd2/civil_war_battle_of_chickamauga_facts.pdf
    • https://cdn.sqhk.co/nifodotiriru/doja3xb/tiny_village_game_help.pdf
    • https://cdn.sqhk.co/dikozogub/ip6ig8X/veterinary_radiography_positioning_guide.pdf
    • http://shoop-fl.ru/pharmaceutical_dosage_forms_capsuleshh6l5.pdf
    • https://xopugexufejan.weebly.com/uploads/1/3/4/7/134709921/734dd.pdf
    • http://goxivomibivufuv.mywebcommunity.org/what_happens_at_the_end_of_the_book_the_maze_runner.pdf
    • https://cdn.sqhk.co/tuzevawu/hfKghjf/nail_art_stickers_christmas.pdf
    • http://jesofoma.getenjoyment.net/samsung_galaxy_tab_4_sm-t230nu_price.pdf
    • http://moresukko.ru/toyota_auris_2016_radio_manualwfisw.pdf
    • http://dommasters.site/geographic_information_system_ebookkfc9l.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_e884ba4556d3412ab06603458b48f785.pdf?index=true
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_973a45ae26a34b90b9106ac41e83e7b7.pdf?index=true
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_f7f0b2a559554963b952eeeeb6f66404.pdf?index=true
    • https://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_b2c3f77d4ee043dbbf297411a3774428.pdf?index=true
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_303afd48641a436e897bdfba3f7690be.pdf?index=true
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_b8977a41342747d9ace0664aad40f9c1.pdf?index=true
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_643f652176544bcdb20f97b012ff1033.pdf?index=true
    • 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_off00014540.bin
84724dc5d5d01ffb5c612890a08e2fad70aef15afb235ed56bd56e3df8dfc729		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14540 5384 bytes
font_01_sfnt_off00015771.bin
097176cbdd4186f4d32a3f582483e5ec5b1c65cb4816f0059551c8a281f633f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15771 11700 bytes

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