Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f9e1bcc126403b…

MALICIOUS

PDF

75.0 KB Created: 2021-02-28 10:03:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a9530a6fdb5cf9919ac93c8d94c9d049 SHA-1: df7884ab2688be39db09dd60295c7ea8c2350acb SHA-256: b5f9e1bcc126403b793f18d9f6120ac13367ac3317e2a2e4d8d1073622bb2783
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to `https://midufefew.ru/123?utm_term=esv+study+bible+pdf+version`, suggesting it's designed to redirect users to potentially harmful content. The PDF structure and embedded links indicate a phishing or malware distribution attempt, likely using a social engineering lure related to 'esv study bible pdf version'.

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://midufefew.ru/123?utm_term=esv+study+bible+pdf+version PDF link annotation
    • https://cdn.sqhk.co/tavaxikanabu/8iawxN4/44513495394.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459034/normal_5fc93f0a2ee14.pdfIn PDF document text
    • https://mogalarozo.weebly.com/uploads/1/3/5/9/135968713/bipod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_602117b18e319.pdfIn PDF document text
    • https://cdn.sqhk.co/zixagiko/qhdWn18/rabbit_in_the_moon_bunny.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/YOjbBki/48580050830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415742/normal_601a3c145ede7.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/cloud_computing_examples_website.pdfIn PDF document text
    • http://wogivodugakovek.mygamesonline.org/nurubilagosoxiwusu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408176/normal_5fca8e98abc81.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/70643324443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_600faea6d1fa7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485695/normal_5ff51f979e179.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/jbiaxSE/harvard_business_manager_studenten_abo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zusaxadixuxot.myartsonline.com/mila_kunis_and_ashton_kutcher_wedding_bands.pdfIn PDF document text
    • http://foxorefo.epizy.com/where_to_find_speed_queen_washing_machine.pdfIn PDF document text
    • http://getewubajup.epizy.com/vowewupujerukawazeke.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_off0000e7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A6 5084 bytes
SHA-256: 153eac2377704b7409344f49d0193e1481ba379bc6afd8f673d5d2765edaf021
font_01_sfnt_off0000f90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90D 11188 bytes
SHA-256: 54648ac74a6161dc085ab5506345f7ad894bd7ce903d314293c7d602eaab6f20

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