Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac0be39dca63297…

MALICIOUS

PDF

79.5 KB Created: 2021-06-04 19:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b828b63b1435198420546c694e6276a8 SHA-1: ebe09b0d07ef35ade0ccee256781ec5f06aa7707 SHA-256: eac0be39dca632978b0db0c0369a0dc9673fe334f720ceeef69cd7e2ec0c4b34
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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 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.
  • 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://ponafet.ru/123?utm_term=lotus+notes+email+template+html PDF link annotation
    • https://gowumobajakexe.weebly.com/uploads/1/3/4/5/134585768/848824.pdfIn PDF document text
    • https://kezozebajex.weebly.com/uploads/1/3/4/2/134265808/4857b8da1bb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_600d452b6a977.pdfIn PDF document text
    • https://fovejurifeke.weebly.com/uploads/1/3/4/3/134342496/1726a3bfe3875.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489263/normal_6007a26b90e6c.pdfIn PDF document text
    • https://pukizorot.weebly.com/uploads/1/3/1/3/131384201/pimolajinas_fazamedo.pdfIn PDF document text
    • https://finenomasawovep.weebly.com/uploads/1/3/1/4/131437785/riviso_tanevesijuxu_veriguriwugas_giwomifuloz.pdfIn PDF document text
    • https://likuxosudiva.weebly.com/uploads/1/3/4/6/134603152/5617831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466659/normal_600d5a61d2ab6.pdfIn PDF document text
    • https://buxijoxusezo.weebly.com/uploads/1/3/1/4/131483018/wibepipovopozu-rokekixixur-gizutegewanijo.pdfIn PDF document text
    • https://lalurarejodu.weebly.com/uploads/1/3/5/2/135297054/9c7160b9aaa.pdfIn PDF document text
    • https://mubelumovetofap.weebly.com/uploads/1/3/1/8/131856402/1107619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_6045c420ed5ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370269/normal_5ff3e996320a0.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/7bf62020-d052-48d0-81b8-d0aacd31abbd/66228459424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57dc871-d75e-4062-80f6-edc0b50ccc29/83905266129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd176eb-4d8c-411a-9f1a-55e2493a9afa/how_to_do_conservation_of_momentum_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aed913ef-6559-4ac7-8405-8b673314d7f9/sewatatufokudube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a549e565-0907-4a48-8494-9c645e930381/poded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8184878-eb4b-47ad-9c2c-9bc1ae52b6ca/73400181497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2d7562-dd70-4ce5-9736-659ae7ab870e/nusitiledalol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c7596f-c906-4900-a77e-db1c708cc366/33708518026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c485d3a-b851-4069-acc4-fae5a8fd5904/char-broil_stainless_steel_4-burner_propane_gas_grill_with_cabinet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfea0b3d-88ab-497b-b25b-f5581564a447/gilelorukoxibevazaner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e6c1ee-aef6-45e3-9b7c-d00cb88b5f2c/edvard_grieg_peer_gynt_suite_1_and_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e267bc6-6051-4b54-b46f-1e939a0595bb/how_to_write_a_letter_to_bsnl_office.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9df7afd-7ff9-48b6-ba48-c940c9228108/39745537030.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_off0000f65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65D 4904 bytes
SHA-256: ef24e7768dae6eefd1508966e21a9a673bb12d24cdf840e6874d7e3d897e504e
font_01_sfnt_off000106df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DF 11680 bytes
SHA-256: 848d1ed1c45ca66973f12afb2432b39c6e9014e1a4c936e1c52b70250ada9bdf

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