Malicious PDF — malware analysis report

Static analysis result for SHA-256 426f8dc18e654231…

MALICIOUS

PDF

79.6 KB Created: 2021-03-21 05:26:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f48abe5c5fbbdb6ef3bfcabc36d1af23 SHA-1: 3596bb6d2836614b738cf6fb886128b528b4f21d SHA-256: 426f8dc18e6542319b02e826692f155ab7f4222eccf9c822c7546943ccc6acde
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://fokemale.ru/wix?keyword=pop+concert+review+examples PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480182/normal_5ffdd51b01a6f.pdfIn PDF document text
    • http://ruvogodozipabiv.scienceontheweb.net/orca_quantum_chemistry_program_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/Vyifji7/shooty_skies_best_gun.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/zeporuvugumufagesoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_605323f7c361e.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/hhiHbib/podcast_addict_apkmirror.pdfIn PDF document text
    • https://cdn.sqhk.co/kogoruzojif/nieOihD/leap_songs_on_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajuwodaf/jheJibi/11119126136.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/19516634167.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/iKicqjj/89426500930.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/japanese_rpg_games_for_pc_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba23d392-49e5-4052-aae1-4c515878f3d3/3282165914.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/speed_queen_washer_manual.pdfIn PDF document text
    • http://gixejemazob.myartsonline.com/can_you_take_the_notary_exam_online.pdfIn PDF document text
    • http://miganuvag.myartsonline.com/modobobafimesadasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea4fbd2-e7b5-45a7-8cd6-95685070a597/visikuvadobiduluwoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc30bb5f-edb0-47cc-b707-55a5de674290/rapid_spanning_tree_protocol_configuration.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/12272436146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6fb5292-8549-4316-90a2-e9970e641cf2/pizazel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b6870d-995c-4e75-b66c-8dae83b7cb4b/853159738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a243ccaa-4b7c-498e-a527-acadb50ed603/panosonob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c94cde4-6129-4c62-9b94-3a3d73f72ed3/tilava.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/edema_formation_in_burn_injuries.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_off0000fbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFD 5300 bytes
SHA-256: 0f4d56544d162f75074a0dfa5b25662ff04bc12adf2c45a7a3f47a199e090389
font_01_sfnt_off00010e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E01 10240 bytes
SHA-256: a48237c657ad354d121d1510334b2ffabf0a2988d1a192d8cb88883488fc07e6

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