Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c439e49ad16e7a…

MALICIOUS

PDF

76.3 KB Created: 2021-03-20 12:13:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d8dd1ce31749b1c70d110770e7855ca2 SHA-1: 4e394620d2d7ca3ee77017040bf45a9a6fb6c665 SHA-256: 33c439e49ad16e7a9612233b408081657783ba3b18fd44190226f00cdacba159
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' further support this assessment. While no scripts were directly extracted, the PDF structure and link farm indicate a phishing or SEO manipulation attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=metaphysical+stores+atlanta PDF link annotation
    • http://delayikapy.xyz/best_machine_learning_books_for_absolute_beginnersa2idh.pdfIn PDF document text
    • http://theharaka.online/the_greedy_triangle_book_video1zgk3.pdfIn PDF document text
    • http://javefuxola.getenjoyment.net/agile_project_management_101_a_beginner_s_guide.pdfIn PDF document text
    • https://kaxawoxo.weebly.com/uploads/1/3/1/0/131070710/labokujapuxelopezel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462696/normal_5ffe5ad96c1bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414672/normal_5fce9e595ce3f.pdfIn PDF document text
    • https://niguzagum.weebly.com/uploads/1/3/5/3/135390192/505165.pdfIn PDF document text
    • http://kimidenexikox.getenjoyment.net/gcf_worksheets_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416321/normal_602d6977bbc72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_6047f92768e55.pdfIn PDF document text
    • http://gumidaz.medianewsonline.com/xowavadosos.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/vavebufevodutob/583770111.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/gegobakupos.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/best_crime_game.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/battlefield_v_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/attestation_d_accueil_pour_visa.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/natuzivogunirukulodezabi.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/farm_animal_worksheets_printable.pdfIn PDF document text
    • http://kuwitabetegipo.myartsonline.com/23965244364.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/game_basara_apk_obb.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_off0000ebd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD3 5128 bytes
SHA-256: 2419a2e661513bf2c14705e392f2812a4005f592413ff1ada7bcdb11fabff0f4
font_01_sfnt_off0000fd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD51 11848 bytes
SHA-256: f003bbc8ca8430f7a4688cd97360f2d94726b372adab5f1412ddc987672c3b18

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