Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d4db29b1de4394…

MALICIOUS

PDF

76.1 KB Created: 2021-03-15 13:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 76e84dfad3849f8e72a1b6f84691e20e SHA-1: 94aa32efe4c84d89cd220123ecdce2e508d86f24 SHA-256: 00d4db29b1de4394ac33e13c96ab8ae1993bf295222aab6bfd96edeee6d144d5
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting an attempt to direct users to potentially harmful content. The PDF structure and embedded URLs point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

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
  • 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://xajibur.ru/award?keyword=character+development+sketch+pdf PDF link annotation
    • http://ninolafe.22web.org/63504400863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451932/normal_5fe970aff0c02.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/hfjdigm/50039006215.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/gcShfhj/jenusemaketajefivuzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451221/normal_602ed6508e827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446152/normal_603837cac625c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421770/normal_5ffaaf42f3592.pdfIn PDF document text
    • https://cdn.sqhk.co/kowetitemaro/djb3fhe/feselumigutepugekadit.pdfIn PDF document text
    • http://vifijes.22web.org/sutitukogola.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489607/normal_5fe463e493fb3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gorifolowisawi.rf.gd/international_journal_of_clinical_and_medical_cases_impact_factor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791811d0-2d92-4cdd-9723-04c43a50205a/building_fell_down_in_new_orleans.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/61703701064.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/compare_and_contrast_essay_worksheet.pdfIn PDF document text
    • http://lijobexabip.rf.gd/1610698402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f4ba37-8118-42ea-aeda-201b0b1b5a35/49188552715.pdfIn PDF document text
    • http://gemunedipu.rf.gd/fedamumufixobomu.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/79642513233.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/61890948617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/856b98cd-31c0-4d68-96be-91e10b9bf37b/45571378631.pdfIn PDF document text
    • http://warurodezum.epizy.com/online_grammar_games_for_middle_school_classroom.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/past_simple_regular_verbs_exercises_primary.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_off0000e91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91A 5424 bytes
SHA-256: 1cd374bdef9b83324ed7b6c31916c51764e9aff367eaafdb5c516cb5d450fb9d
font_01_sfnt_off0000fb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB64 11112 bytes
SHA-256: e80e13e892358a3b0d460ee98e29018a2c6b19be3ba97c13ef8656a64f1a4cc0

Open this report in the interactive analyzer, or submit your own file for analysis.