Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5466b1fbd73ad96…

MALICIOUS

PDF

80.7 KB Created: 2021-03-10 16:56:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 815005514e8a631092907167a2a15a75 SHA-1: 463bbeecc444c1a52bf363c46196f7f899f051a8 SHA-256: b5466b1fbd73ad96adfc2dc1ccf65d1f281f62287926d8ded720452d4f0ff94e
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URIs, many pointing to disposable hosting and acting as a link farm, suggesting a phishing or malware distribution attempt. The presence of external URIs and the link farm heuristic strongly indicate an attempt to redirect users to malicious sites.

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://dugedepap.ru/strik?utm_term=what+is+self+determination+theory+google+scholar PDF link annotation
    • https://cdn.sqhk.co/tezofugowura/jfNfhbr/offline_english_to_spanish_translation_app_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/bajowekununa/jbVrUlo/92729861846.pdfIn PDF document text
    • http://logawedulukudan.mywebcommunity.org/rutibufega.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476569/normal_5fce94586db29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409607/normal_603833111d047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389097/normal_5fd73e9b2115d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386622/normal_5fce07ff08b65.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/3zT9gg8/razas_de_perros_mas_inteligentes_ranking.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/how_to_reset_uconnect_ram_1500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467278/normal_5fe9d45227db3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476123/normal_60388649b1db4.pdfIn PDF document text
    • http://rigudozefogo.mypressonline.com/42130339199.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476939/normal_5fc5bb89d6ab7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6c4b7f-e394-4216-ab81-145063d1b283/how_to_get_the_tension_right_on_a_janome_sewing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/astronomy_eric_chaisson.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/ben_10_alien_force_all_aliens_transformations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f86cd783-6cc2-4151-9f12-16c08571a751/what_causes_thick_callus_on_feet.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/31141473354.pdfIn PDF document text
    • http://taguloxutenafol.myartsonline.com/livre_hammoudi_appareil_digestif.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_off0000fdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD8 5548 bytes
SHA-256: fd5e956e28a9df3ef6dc962d04441bb60e5b633f4b6470d44563fde46179f81a
font_01_sfnt_off000110a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A4 11104 bytes
SHA-256: 30f930f13aa092a4c3382ed4491a0f1da93d2c5a2ea00abdc7fe07a29588c854

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