Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5a3d090cb9fada…

MALICIOUS

PDF

76.8 KB Created: 2021-03-21 07:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 747a6ab75825eefd28adb9d28e74700c SHA-1: 2324f99efefd3284356f4b8cced5caf0ee49f125 SHA-256: fb5a3d090cb9fadafa60e3e4937dd7b33cbee281b13725c431221c84f76d6014
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 and an ML classifier, indicating malicious intent. It contains numerous external URLs, with one prominent URL pointing to `https://jumiwimov.ru/123?utm_term=leigh+guided+bus+route+map`, suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, appears to contain metadata related to a route map, aligning with the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/123?utm_term=leigh+guided+bus+route+map PDF link annotation
    • http://remont-kvartir-otzyvy.moscow/aplikasi_bobol_wifi_id_apkcpxi1.pdfIn PDF document text
    • https://regasefes.weebly.com/uploads/1/3/1/8/131871592/viketisejiwadapu.pdfIn PDF document text
    • https://cdn.sqhk.co/sivojadirabe/hd2dihS/bmcc_bookstore_return_policy.pdfIn PDF document text
    • https://sejesomizibiji.weebly.com/uploads/1/3/5/3/135346687/wavumidisex-nijedefusob-xatuzez-lovilezobom.pdfIn PDF document text
    • https://nizedavigo.weebly.com/uploads/1/3/4/8/134879015/02a76.pdfIn PDF document text
    • https://cdn.sqhk.co/setanutoba/gjbOSji/endnote_x7_free_product_key.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/sOGNjgg/battleship_legion_war_of_pacific_rim.pdfIn PDF document text
    • https://repewagisax.weebly.com/uploads/1/3/5/3/135319399/7047384.pdfIn PDF document text
    • http://gakivako.iblogger.org/94006453210.pdfIn PDF document text
    • https://xabonawof.weebly.com/uploads/1/3/5/9/135965837/63fa782fa60ea.pdfIn PDF document text
    • http://kungfumalibu.com/vanilla_buttermilk_sheet_cake_recipeedhsv.pdfIn PDF document text
    • http://keepqifi.site/pewimekanatugireferetubadgrdx.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/6129388.pdfIn PDF document text
    • http://italia-doc.space/gosubuwutusaduz40hsi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lebodevafetag.epizy.com/86489191591.pdfIn PDF document text
    • http://xorevepol.epizy.com/is_oster_a_good_brand_air_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/575679b1-3ed7-449d-a2f4-fe42c2cf7720/43185495054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afe8e6d2-6c09-4c55-a3c5-4d0a53e8f573/19571460640.pdfIn PDF document text
    • http://revipopeguxasaf.epizy.com/how_to_use_instant_pot_duo_nova_water_test.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_off0000eca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA6 5420 bytes
SHA-256: 6785e0a4d7334f2b90f2ff06f29765e91f1ec8b094ae1429d79b6cf97f33c73f
font_01_sfnt_off0000fee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 11016 bytes
SHA-256: db86c9923db0a73c2845cc5676eb628337aa155f247518f96e96d236b72f3963

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