Malicious PDF — malware analysis report

Static analysis result for SHA-256 056c5fda35039426…

MALICIOUS

PDF

79.4 KB Created: 2021-03-23 22:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84bfbb6111e87b3a026f11c3ac7a7247 SHA-1: 72c571431471df0cedc886774479d9e0311dccf1 SHA-256: 056c5fda350394267d77de2b86a69d34f69a300910909e66d937b7d8f2fcc7de
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one identified as a potential phishing lure related to 'ignou marksheet pdf'. The ClamAV detection and ML classifier strongly indicate maliciousness, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/award?keyword=ignou+marksheet+pdf
    • http://helplnstagramcontact6088756.com/89773691506box4z.pdf
    • https://cdn.sqhk.co/buzivafulet/iONazH6/thyristor_scr_datasheet.pdf
    • https://cdn.sqhk.co/mogudekusab/dSkeLgc/4548711101.pdf
    • https://cdn.sqhk.co/wesuwajil/MRccjbg/call_of_duty_zombies_maps_black_ops_3.pdf
    • http://triple-doska1.club/antecedentes_de_la_desercion_escolarufumh.pdf
    • http://drilltech.info/xulomemabljd9p.pdf
    • https://cdn.sqhk.co/jumifokujuje/ghMhh5T/28603336668.pdf
    • https://cdn.sqhk.co/febapaji/ZwKiiji/edge_lighting_s10_apk.pdf
    • http://lazerepil.site/96244743378tjwrs.pdf
    • http://blog-millionaire.buzz/technical_aptitude_test_questions_and_answerscu554.pdf
    • https://cdn.sqhk.co/mapelimujeku/fZif2Jd/time_clock_worksheets_for_3rd_grade.pdf
    • http://mainsale.info/mechanics_of_materials_beer_4th_edition_solutionsppn2i.pdf
    • http://accueilcmb.com/864421957593jv35.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_58dac187c5e04fcaafbb157bbba19fe4.pdf?index=true
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_a83c3ccbd668425695c3d4eea2bc66f2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/44083c46-0b91-44b0-b3dc-cd01ee3d033a/automobile_industry_mechanical_engineer_salary.pdf
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_9a23165061a7414f85eb2cd550c9e4b8.pdf?index=true
    • https://f72e0e13-a873-49c5-9cb5-3c2848b8c5b2.filesusr.com/ugd/f8ba4b_2e258ec1c75145f8909c74bdc81a8123.pdf?index=true
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_c87ae64c211d458584a7363317cf82be.pdf?index=true
    • https://uploads.strikinglycdn.com/files/048ed908-8d47-4082-9eff-aee3b9d6f1bd/pexibaxakixoremuno.pdf
    • https://uploads.strikinglycdn.com/files/f760c1ca-840f-4de1-99bb-01bc579c0933/how_to_draw_a_turkey_stack_folding_surprise.pdf
    • https://uploads.strikinglycdn.com/files/c66881a5-d6a9-40d6-a173-3550030534b8/55180019756.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f721.bin
5f62c6c8672ac42808f9db0640a59047b0b421308bd012db0fe861ba6bd3b90e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF721 5424 bytes
font_01_sfnt_off0001096b.bin
eafb703575c9d65785bcf836796741ac0660e9fb7d263553e935e2e4e116f322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1096B 11412 bytes

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