Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59a9e69451b5074…

MALICIOUS

PDF

83.9 KB Created: 2021-03-11 10:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d0f9a252c72ebc3c886387093459e3a7 SHA-1: 22290f54570b4897246fc05497067a0db7364bcc SHA-256: b59a9e69451b50742d03e6b574136b9b2e7ca93c428c532d49946d2aaaea852c
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or redirection attempt. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily corrupted, contains text related to the UEFA Champions League final, suggesting a lure to attract user clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/123?utm_term=uefa+champions+league+final+2018+highlights In PDF document text
    • https://cdn.sqhk.co/bitizulokiva/fibwdjf/kazilegepasidipepuzejipa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_60405488458f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_6031d9529e2e7.pdfIn PDF document text
    • http://ninuwekevap.scienceontheweb.net/fadezemilarikoturowe.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/VheiepH/wititogutiwagarun.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/83793898817.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/90662510306.pdfIn PDF document text
    • http://gixapedotamerow.mywebcommunity.org/32823791825.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/how_to_steam_vegetables_with_a_steamer_basket.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/dhagf3N/75370905993.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowosos.myartsonline.com/kerbal_space_program_mods_steam.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_f90503084d644749a272fdb7b200ebe2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debiwelof/nidedaguwire.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/does_old_navy_sell_maternity_pants.pdfIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_bb9b5c253d744cea89438c06983f5bee.pdf?index=trueIn PDF document text
    • http://vobikeretuwof.atwebpages.com/how_to_assess_speaking_skills.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_ac441461bce243f2a5161e4e1a22c3c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/witness_intimidation_sentencing_guidelines_uk.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/81604204436.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/jugalexoxizukupeges.pdfIn PDF document text
    • http://zapusov.atwebpages.com/nejujutepaxamemene.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12A 5844 bytes
SHA-256: 8eacc0a9c6653548ab0c9817075a24adfae660010a6ae46d4cb2a757b0c48d4d
font_01_sfnt_off000104f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F8 12096 bytes
SHA-256: 49447cbc97b84fa55e092528875941f3af813bec225322f138afdfe220b1c44f
font_02_sfnt_off00012c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C99 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e