Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c09e3632a6082f…

MALICIOUS

PDF

84.5 KB Created: 2021-05-07 01:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bb8c176314b29c5ce7c5197ec6142906 SHA-1: 57c71fb66ece625af67f9840b443264db40040d4 SHA-256: 47c09e3632a6082fd06b53b1805bfa8900ced9e6123ab2e0cb1c233129116d73
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9998

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 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.
  • 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/strik?utm_term=vector+calculus+6th+edition+slader PDF link annotation
    • https://cdn.sqhk.co/totafeta/4nghjg9/80334031740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418399/normal_601dd81e8491e.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/abFicV5/23892406106.pdfIn PDF document text
    • https://cdn.sqhk.co/jusupovexewa/ijg7iim/neighborhood_market_near_me_hours.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483365/normal_5fd905becded9.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/hbQDIhc/fifa_world_cup_2019_schedule_ist.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408990/normal_606790e591d4e.pdfIn PDF document text
    • https://cdn.sqhk.co/vubiwete/djcl75Z/nujuzinovugubiziboses.pdfIn PDF document text
    • https://cdn.sqhk.co/kakezesarop/gcokhd4/96289374387.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/qxZ4jd8/mutant_mod_zombie_addons_and_mods.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/thfO594/78193391258.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/gcib5jf/best_station_heroes_lords_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/AW35jid/9303129167.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_df80aec15acc4a30a01ccaaf7104d1bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3f1cd5-53e6-40eb-ab4e-ac4a1b4710a1/34243673999.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_288ec1095df14cbebca2d17f074bccc4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/692cffa3-74c9-414d-a0b4-c6756e7340dd/55846486326.pdfIn PDF document text
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_06553f8d5bc14a56a2c08b3673c9d44f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97653546-3421-4b0d-bb9d-294dbbea15ae/what_are_the_ethical_issues_in_this_situation.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_off0000f4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BD 5148 bytes
SHA-256: 5f3576602da56cf11d4c494c01c489660ebbac431d7de335a21704613166247c
font_01_sfnt_off00010638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10638 11660 bytes
SHA-256: ac8d5e49ac3c6814d0d64e2fe7b1d63b7a4934dd3994504ef14a7999f51ae305
font_02_sfnt_off00012dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFA 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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