Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b0afbef274b4fb…

MALICIOUS

PDF

74.3 KB Created: 2021-03-11 18:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7d64306ecb7f7a60ffe37cc5b1ff08c8 SHA-1: f56b3a508dc549eb59da6690b773f694e4bb9a8d SHA-256: 12b0afbef274b4fb1b35911d95f97d0b46b2a8632076fcd9e6bca275baaf8096
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/123?utm_term=matlab+discrete+wavelet+transform+code In PDF document text
    • https://cdn-cms.f-static.net/uploads/4501046/normal_6012580d5f213.pdfIn PDF document text
    • http://zabidegelid.iblogger.org/minecraft_server_1._12._2_forge.pdfIn PDF document text
    • http://ponarolo.22web.org/dictionnaire_scientifique_franais_anglais_gratuit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407996/normal_5ff1186db3e37.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/momaregam.pdfIn PDF document text
    • http://a1metromovers.com/r_in_action_2nd_editiontvera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386091/normal_5fe3de0e053ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443610/normal_5ff5a6597fc85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443356/normal_6025bf9c63e92.pdfIn PDF document text
    • http://raruranakadup.iblogger.org/internet_streaming_tv_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_60247ef6d47c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472486/normal_5ffc0a895c259.pdfIn PDF document text
    • http://esclub.info/how_to_reset_ink_level_hp_deskjet_2135v7pog.pdfIn PDF document text
    • http://tivuximuliku.mygamesonline.org/automation_anywhere_control_room_user_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gogidovegesoxe.epizy.com/63943670975.pdfIn PDF document text
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_b8749796a5ee4385b4d47c9e333d79a1.pdf?index=trueIn PDF document text
    • http://giduzorim.epizy.com/78336309630.pdfIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_2abc249699084c0e8695d7c373704f39.pdf?index=trueIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_f9aa2c1220b44468bb991db3b466ea98.pdf?index=trueIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/72546851759.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_52ad03c2e0984c78861ee7477b67e61e.pdf?index=trueIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_585f4be0f15c46a98cd8bfd85e65b02c.pdf?index=trueIn PDF document text
    • http://wenares.myartsonline.com/every_living_thing_by_cynthia_rylant_slower_than_the_rest.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_off0000e3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EC 5464 bytes
SHA-256: e9666eb9020395ec58b918243af0ad9a019ba3c22fb8a3bfc52c13fbf765131b
font_01_sfnt_off0000f68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68D 10864 bytes
SHA-256: de74cebd3b704d728299dd869641affdd24db22afa7b0571b763b3eecbfc2cbd