Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1eb88a1849b194…

MALICIOUS

PDF

91.5 KB Created: 2021-03-09 16:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 481df0d0960befec092804fabd353733 SHA-1: 2409fa47816ce45301d12f735adffc6de0282b18 SHA-256: de1eb88a1849b194a2fbf325b98ac33e2b95c23ef68b77ea0882737d9753a84a
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with a high-confidence heuristic flagging it as a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL 'https://maypoin.ru/strik?utm_term=can+smartwatch+be+used+without+phone' is the primary indicator of compromise, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=can+smartwatch+be+used+without+phone PDF link annotation
    • https://mogufujekomepit.weebly.com/uploads/1/3/1/6/131607600/piwezunev.pdfIn PDF document text
    • http://indir-kazan.com/medieval_2_total_war_kingdoms_mods_stainless_steel3skh7.pdfIn PDF document text
    • http://zotoxilob.getenjoyment.net/star_wars_ahsoka_book_barnes_and_noble.pdfIn PDF document text
    • https://guvemixekowarov.weebly.com/uploads/1/3/4/6/134686109/354ca0a.pdfIn PDF document text
    • http://feelslike35.com/what_are_examples_of_metaphors_in_poetryac6z9.pdfIn PDF document text
    • https://fukidupedogof.weebly.com/uploads/1/3/2/8/132814182/807b3ac0deb.pdfIn PDF document text
    • http://monoga.space/blade_inductrix_fpv_hd3dm5v.pdfIn PDF document text
    • http://tlgfree.xyz/statistics_for_the_behavioral_sciences_10th_edition1od36.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/bibeju.pdfIn PDF document text
    • http://lesantyqas.online/to_the_moon_and_back_infinity_tattoomarv0.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/arthur_conan_doyle_sherlock_holmes_short_stories.pdfIn PDF document text
    • http://erogan-encolumbia.site/zopobifodakamukilizuzupivymfxj.pdfIn PDF document text
    • https://potepivogatofef.weebly.com/uploads/1/3/2/7/132740463/8711807.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/sikuva/diablo_3_switch_multiplayer_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b04309e0-ef44-4b2a-928a-43da0e758a1e/what_does_greenery_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2005e9bb-156d-4fb4-a3ad-0af64fbbbfab/29146367079.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/human_resource_management_ppt_template_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ecf965-d7ee-4755-87d2-279a643a2e74/thank_you_for_the_email_reply.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/azatioprina_50_mg_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/17001681816.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_off000129c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C7 5416 bytes
SHA-256: 0ea8c6855301be747648ac1c997adbad0cfb26f3eec4b03c032503fa680f6d51
font_01_sfnt_off00013c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C10 10824 bytes
SHA-256: 2e58f009a0b41b29ecfe0c4c806dc0e52a914013257f240cd64616ad29ffc9fe

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