Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bddc058bc667374…

MALICIOUS

PDF

141.7 KB Created: 2021-03-28 19:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 112dbcf4f6d284ec632e8969145f5129 SHA-1: 1599fe4e283e14f15fa6a221f7238c9280cf84b3 SHA-256: 6bddc058bc667374bf339fd15fca8a27e1ba42513dd05ee230d2f4353899b9af
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO farms or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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
  • 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://vilenefex.ru/wix?keyword=what+happened+during+the+ice+storm+quizlet
    • https://kogemujifogez.weebly.com/uploads/1/3/4/3/134344524/tobenaba.pdf
    • http://watutuwox.iblogger.org/ischemic_stroke_prevention_guidelines.pdf
    • http://lenulari.mypressonline.com/20277461047.pdf
    • http://vumajuzatijerak.getenjoyment.net/51257570449.pdf
    • http://pifumufupes.iblogger.org/96168383942.pdf
    • https://saniluje.weebly.com/uploads/1/3/4/3/134323688/porixisizogewa-volaw.pdf
    • https://vawuwoteb.weebly.com/uploads/1/3/0/9/130969488/3197698.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kotodur/nfl_score_predictions_week_2_bleacher_report.pdf
    • http://nivigiwaragere.epizy.com/activador_windows_7_loader.pdf
    • https://s3.amazonaws.com/zetituri/xosifubezego.pdf
    • https://uploads.strikinglycdn.com/files/0509cbc1-aff6-4640-bd02-95dadf6e1c57/63758328450.pdf
    • https://uploads.strikinglycdn.com/files/3f4311a9-6b84-456f-8f27-5c7b4904c952/build_a_rocket_stove_mass_water_heater.pdf
    • https://s3.amazonaws.com/jinabom/53901855673.pdf
    • https://s3.amazonaws.com/falufusu/bodbot_plus_apk.pdf
    • https://uploads.strikinglycdn.com/files/8cd23552-3873-4fee-8f27-eb78dd1afe47/46965235417.pdf
    • http://sisuvoxodukon.epizy.com/amabile_1996_creativity_in_context.pdf
    • https://uploads.strikinglycdn.com/files/d83ca078-d045-4cec-884f-a577eae9aa0e/how_to_master_the_art_of_sales.pdf
    • http://nosigegu.onlinewebshop.net/14199954945.pdf
    • https://s3.amazonaws.com/vasofirida/79132703294.pdf
    • https://s3.amazonaws.com/zazelujeju/google_chrome_apk_android_8._0.pdf
    • https://s3.amazonaws.com/mozedijiz/47756184032.pdf
    • https://uploads.strikinglycdn.com/files/5db13fa1-b842-48e0-9c53-b19eb9059d61/instalacin_de_gas_natural_en_viviendas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e363.bin
51fabba24fc398ee99c577d29ab411db25a6ce5d094d2acb19baa8131daaa98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E363 5556 bytes
font_01_sfnt_off0001f620.bin
e08afb1c9be190006936a3ff6a53fc1c3e428e17b6c676d9aba80a7231f61a05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F620 10772 bytes
font_02_sfnt_off00021ac2.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21AC2 4324 bytes

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