Malicious PDF — malware analysis report

Static analysis result for SHA-256 b44f0fea73d7a217…

MALICIOUS

PDF

81.3 KB Created: 2021-05-07 00:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1f6b2be48b1c974c2aefd669b290c2bf SHA-1: dbf096e195cfb7e1e4e8651da4c57ca55e829661 SHA-256: b44f0fea73d7a217d42839ca8b5d4c4813271b17aa36641c0237b378b02c6e3f
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The document contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious content or phishing sites. The presence of these URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=nessun+dorma+andrea+bocelli+leicester PDF link annotation
    • http://wow50.pro/34218090704ryrtq.pdfIn PDF document text
    • http://euromarket.pro/ecosistema_acuatico_y_terrestre8f07x.pdfIn PDF document text
    • http://tibagisuminove.sportsontheweb.net/sled_driver_book_for_sale.pdfIn PDF document text
    • http://leaninrzpd.site/49232049573hdffe.pdfIn PDF document text
    • http://lukiduxipapep.mywebcommunity.org/1975252162.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/blank_biodata_form_download.pdfIn PDF document text
    • http://redpandarecycling.com/check_engine_light_codes_on_jeep_grand_cherokeede9kf.pdfIn PDF document text
    • http://lobafor.mypressonline.com/woolworths_food_specials.pdfIn PDF document text
    • http://vexoxem.scienceontheweb.net/11641067803.pdfIn PDF document text
    • http://reduslimitalia-official.site/4329275689v4hvl.pdfIn PDF document text
    • http://witomemu.scienceontheweb.net/mastering_autocad_2020.pdfIn PDF document text
    • http://lavkavkusa.store/what_word_means_to_push_food_through_your_pharynxlv7ts.pdfIn PDF document text
    • http://test123test.xyz/sukuxiwipikogobifulis98pau.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_54888591bb8a4de2a423d0d05a44a713.pdf?index=trueIn PDF document text
    • https://65f7c47b-6fa2-4aed-9649-637438a88329.filesusr.com/ugd/8fb471_805ba933b52240469654cac9ec54a65c.pdf?index=trueIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_1385fdb07079418fbad29e5677d31e7e.pdf?index=trueIn PDF document text
    • http://rufuxikokuka.rf.gd/terapi_neoplasma.pdfIn PDF document text
    • http://bileperiwuxi.epizy.com/8145762999.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24E 5076 bytes
SHA-256: 8a7e53f65c1e587fa5cb4a3454b9f8d82a6babe8d8bb459365f8a8b347ba69a3
font_01_sfnt_off0001036d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036D 12000 bytes
SHA-256: cedacaf82a8af3297b08e0ff3d0982ed0560b3280ceeb2aa33945f0cc4aef9f3
font_02_sfnt_off00012a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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