Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde9fab9ef111e10…

MALICIOUS

PDF

95.4 KB Created: 2021-03-14 16:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 210aa89712d37b092efcb4c2cb019b6d SHA-1: 9dae5f6dda8720def7847828fdb979ef5503e1be SHA-256: dde9fab9ef111e102a557b24b1c18786de57809565af9f37e3386748e160989d
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. 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 0.9997

Heuristics 7

  • 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 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.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://seumenha.ru/wix?keyword=elvis+presley+hollywood+walk+of+fame+location PDF link annotation
    • https://folenepawesig.weebly.com/uploads/1/3/2/6/132680852/6803357.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/gheS9gd/rank_in_smash_ultimate.pdfIn PDF document text
    • https://vavaxurose.weebly.com/uploads/1/3/0/7/130775274/91a87a804810c.pdfIn PDF document text
    • http://sabewasarakabi.iblogger.org/nujoxo.pdfIn PDF document text
    • http://wobepatonogez.iblogger.org/tojokuwuvedalogaware.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/cOxjagc/kavopiju.pdfIn PDF document text
    • https://cdn.sqhk.co/romafime/jdBmzih/zutubonijitusebo.pdfIn PDF document text
    • http://kabomodom.iblogger.org/82381166640.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_6cd0d8fa731f4d749b0dc2afdf64cbc6.pdf?index=trueIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_ac8e4be757d0403bb4ad833115300919.pdf?index=trueIn PDF document text
    • http://tusamovukubug.epizy.com/6717197905.pdfIn PDF document text
    • http://tosebimujuted.epizy.com/scary_stories_to_tell_in_the_dark_red_room_monster_scene.pdfIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_d01e23531215418da4f1297b729841ef.pdf?index=trueIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_d1ee4f4b9d964526b2fbbd29fd9dac4a.pdf?index=trueIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_5d0b7629d1c34ee599eaacf90ed6cbec.pdf?index=trueIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_e5482f0002b346d28063413a9d7cee85.pdf?index=trueIn PDF document text
    • http://jolasesiv.epizy.com/aritmetik_dizilerin_formlleri.pdfIn PDF document text
    • http://divupovive.epizy.com/nottingham_map.pdfIn PDF document text
    • http://muvabeso.epizy.com/38126849784.pdfIn PDF document text
    • http://xenemusexo.epizy.com/hamlet_william_shakespeare_characters.pdfIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_4c9d59b68b3143f98c940c8033563cd1.pdf?index=trueIn 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_off000133b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B1 5672 bytes
SHA-256: 6e5b7a2f05ac1e98c2ad7c51aba040e614d9215939caff345cc5b9f4e404b3ca
font_01_sfnt_off000146f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F2 11832 bytes
SHA-256: 4f5810a622508525d337b586a9bf04e21863da75475df3e1249965ea8a68ebb0

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