Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1492d2694b236b2…

MALICIOUS

PDF

82.6 KB Created: 2021-04-01 20:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5579c754f1cc52d586913e8ddea21ae9 SHA-1: 2d6e8dd2277996df34be13c13d7c4528a14173d5 SHA-256: a1492d2694b236b2c8abdffcaeb5a211da94565cce032de1360525c83804963f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The PDF contains a large number of external links, many of which are dynamically generated and likely part of an SEO link farm designed to distribute malicious content. The embedded URL 'https://ponafet.ru/strik?utm_term=les+trois+mousquetaires+film' suggests a lure related to the movie 'Les trois mousquetaires film' to entice users to click through to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=les+trois+mousquetaires+film
    • https://cdn-cms.f-static.net/uploads/4384822/normal_5fe81fd8398b4.pdf
    • https://static.s123-cdn-static.com/uploads/4419191/normal_5ff8c7a268088.pdf
    • https://cdn-cms.f-static.net/uploads/4413978/normal_5fe9e1f6e5b6b.pdf
    • https://static.s123-cdn-static.com/uploads/4496605/normal_5ff1ae6556aae.pdf
    • https://vebajixumese.weebly.com/uploads/1/3/4/4/134483039/nawovidodu-bikusane-birero.pdf
    • https://static.s123-cdn-static.com/uploads/4388426/normal_6006711876282.pdf
    • https://cdn.sqhk.co/zifiguwosu/T1hbxia/koximuwitifelapoxepagomi.pdf
    • https://static.s123-cdn-static.com/uploads/4464861/normal_5fef7ef519323.pdf
    • https://cdn-cms.f-static.net/uploads/4366406/normal_6012639862482.pdf
    • https://cdn-cms.f-static.net/uploads/4365560/normal_604f7b2c17f85.pdf
    • https://kolokizegilo.weebly.com/uploads/1/3/4/3/134370221/pibosix_tavejasesoxera_lamexobinujo.pdf
    • https://cdn-cms.f-static.net/uploads/4485435/normal_601449f47e922.pdf
    • https://xanerenidijuv.weebly.com/uploads/1/3/0/7/130739333/tevobu.pdf
    • https://bitoranajezope.weebly.com/uploads/1/3/1/4/131453137/7254344.pdf
    • https://cdn.sqhk.co/dowivita/mNQvMEx/ccna_1_francais.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/23ab513a-0c61-46b3-8463-16fdfce99190/everstart_jump_starter_1200a_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/245d07c2-c8a6-45ba-a858-c9711d0bafef/water_normal_map_4k.pdf
    • https://uploads.strikinglycdn.com/files/c762d59c-393e-4ab2-8c08-d0ac310b393d/31401517792.pdf
    • https://uploads.strikinglycdn.com/files/06d47d03-666c-4ccd-9070-7d9ba5f89f5c/mapa_comunitario_de_riesgos_ppt.pdf
    • https://uploads.strikinglycdn.com/files/969ead75-4cb2-4f34-aa57-5c55934a3539/why_is_my_freezer_door_not_sealing.pdf
    • https://uploads.strikinglycdn.com/files/d545240c-7e78-4c33-80a8-c4dd5742d707/farberware_coffee_machine_manual.pdf
    • https://uploads.strikinglycdn.com/files/1072a040-06bb-4611-b0f3-d0ffc29df67f/wabofovalomopimufekugad.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010437.bin
1a06d20a1980da84bf08d822c04e7783575c7eab4726c3feb727e87896f036cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10437 4980 bytes
font_01_sfnt_off00011514.bin
5f8785afd8cb71b7eb97d19eec633a919193724ac767fbc9e2965c26784acd84
pdf-font-stream PDF embedded font (sfnt) at offset 0x11514 12764 bytes