Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92546a46a62bd5d…

MALICIOUS

PDF

90.8 KB Created: 2021-03-15 16:35:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 561f34fa38f0fea0b179e8a04aa2d37c SHA-1: 9eccae4ca546b3184feaf8434e3ed23b957ffb4a SHA-256: f92546a46a62bd5daec6d7df40b4c71fd79a47b53f02a52c0743c0f0872d0868
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/aws?utm_term=what+does+the+4th+industrial+revolution+mean PDF link annotation
    • http://dezlice.ru/lowelitofizs5191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478146/normal_5fd76c9cefcb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_604d2d3aba009.pdfIn PDF document text
    • http://trendmobile.ru/liniwaxoxekof3prak.pdfIn PDF document text
    • http://metarapuw.mypressonline.com/soprano_alto_duets.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/abacus_maths_notes.pdfIn PDF document text
    • http://unosital.space/app_to_screen_record_apple_musicjwa5j.pdfIn PDF document text
    • https://voromelub.weebly.com/uploads/1/3/4/8/134872571/posura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454546/normal_5fd0f1eee9631.pdfIn PDF document text
    • http://frankiearvelo.com/tupafilugazugasadizupzrmuo.pdfIn PDF document text
    • http://kelnoteres.xyz/841120906160uvt8.pdfIn PDF document text
    • https://korexabareruwa.weebly.com/uploads/1/3/2/6/132680962/4581528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0f3edd0-503e-45cb-86ec-3697a6c3ce1f/1285373480.pdfIn PDF document text
    • http://zinurefel.rf.gd/how_to_adjust_valves_briggs_and_stratton_17.5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deb11d96-a425-41d1-8234-a33ff36edc06/nabubobu.pdfIn PDF document text
    • http://sovizaz.epizy.com/chicago_style_bibliography_format_for_websites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54cb02da-751c-43d9-acd9-35caa06545e4/how_to_adjust_shimano_di2_shifters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b10606-ee45-4a29-bb6c-b487056a6e3f/willy_wonka_and_the_chocolate_factory_tunnel_scene_images.pdfIn PDF document text
    • http://wudazebej.atwebpages.com/kesuwajuwuvajajibubel.pdfIn PDF document text
    • http://ralapiguz.rf.gd/xat_verbal_ability.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/820b78d3-8d8f-41b3-ad51-ae5f756415bc/perfume_the_story_of_a_murderer_2006_hindi_dubbed_watch_online.pdfIn PDF document text
    • http://ligumawi.epizy.com/assistente_certificado_digital_serasa_experian.pdfIn PDF document text
    • http://bubaregelore.rf.gd/mixaposiji.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_off00012387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12387 5224 bytes
SHA-256: 2433d69930bcecab793405347c78dcc61f88c46eb29426f840cd1aa805fdbb91
font_01_sfnt_off00013539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13539 12360 bytes
SHA-256: 0c5a6f9f57cb3b103ca4911e639ced1d089bded3a1ae86027eb9aecffd53f7bd

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