Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a28be785eff238…

MALICIOUS

PDF

76.2 KB Created: 2021-06-10 06:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 048e43f6d0b300aab59edabb8c9db79e SHA-1: 46c2be88439749af974491a37d150976d51566b1 SHA-256: 95a28be785eff238c2f89d7dbe15b98d9fce7e2d8334ce0b5f23e138449b6d20
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to external URLs such as 'https://wastran.ru/pbw?utm_term=movie+hd+download+app' under the guise of providing movie download applications. The PDF structure and embedded links suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://wastran.ru/pbw?utm_term=movie+hd+download+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426822/normal_6042e94636dbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417141/normal_600d0c467fc6b.pdfIn PDF document text
    • https://mulafixi.weebly.com/uploads/1/3/4/3/134317856/7758752.pdfIn PDF document text
    • https://sokijotebeveme.weebly.com/uploads/1/3/4/7/134767098/5282158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414689/normal_606886b8cd234.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5fedbc8cb1c4c.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/78957e50-551e-4704-8670-c4372a31ba07/lawegog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65afb8d8-8aa6-46ec-bafb-f0a864cd26b1/95554896940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97737df8-7b74-4bd2-bc5b-7523f300ddeb/glanzer_and_cunitz_procedure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ea44e4-7343-40a7-8e81-7c7676ef5f18/38665269267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1889665b-b557-46c7-bd79-6bb9a896ee81/zajuranonifovivum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee1e701-be49-40c6-a887-094a2ac458a6/90644975738.pdfIn PDF document text
    • http://xifatarege.pbworks.com/w/file/fetch/144898998/walang_hanggang_paalam_nov_20_2020.pdfIn PDF document text
    • http://wuwazilizos.pbworks.com/f/what_is_humanistic_approach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/546a235b-e8ae-4c0a-ab35-0a6fecb54c8e/what_is_the_30_minute_circuit_at_planet_fitness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b0878e3-a397-4c50-b623-8585c0ca369f/how_do_i_know_if_my_fridge_thermostat_is_broken.pdfIn PDF document text
    • http://vuxoris.pbworks.com/w/file/fetch/144606936/menitinipesosudemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4213146-b63c-41c6-a000-655cc634df00/beretta_m9a3_9mm_accessories.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/f/wofaji.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_off0000eda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA0 4928 bytes
SHA-256: 3db10e63c9bea9e2b56e8231a8ff2f9181d57971209dbffa466438597a382484
font_01_sfnt_off0000fe87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE87 10956 bytes
SHA-256: f5f16f2b9e16930b05d3e15b3ddee7df676f23605556d8c8676fede5555723d0