Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ff96f54eaa948b…

MALICIOUS

PDF

85.3 KB Created: 2021-06-10 18:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b3aad3245dc853099900b6b6703c6fb2 SHA-1: 68e9a401dcdf85c887c1d0d9e7f1aeb52d1ba911 SHA-256: 03ff96f54eaa948b6a934b49e5bbf5618c561b3a1995e1b6856ea9131fd04d51
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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://pixomot.ru/pbw?utm_term=the+path+to+hell+is+paved+with+good+intentions PDF link annotation
    • https://bipovubukixepev.weebly.com/uploads/1/3/2/7/132740720/vafetujulibetuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406516/normal_604cc1ed569e5.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4410002/normal_60b549c8edc09.pdfIn PDF document text
    • https://zevenaxef.weebly.com/uploads/1/3/4/7/134745307/pixatabakupod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482191/normal_602380b73f615.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/1567519.pdfIn PDF document text
    • https://poxusesemeli.weebly.com/uploads/1/3/4/4/134462398/1b8909.pdfIn PDF document text
    • https://pafuzoxim.weebly.com/uploads/1/3/4/5/134585506/bb497e3acf4c2.pdfIn PDF document text
    • https://xugugizebe.weebly.com/uploads/1/3/1/4/131482894/ba3792fa476e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393485/normal_5fc9caf38f69b.pdfIn PDF document text
    • https://kejazomunago.weebly.com/uploads/1/3/0/7/130776678/2543883.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425010/normal_605b74c854b57.pdfIn PDF document text
    • https://dajifavetesa.weebly.com/uploads/1/3/4/2/134234726/zunusinem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5ff4dee235a9a.pdfIn PDF document text
    • https://jigurojo.weebly.com/uploads/1/3/5/3/135321607/1219969.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/33d29a55-5a60-40eb-a624-d1de0e7086db/12548479028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5734684e-f386-4f8f-8db8-9f8d0b44505f/25043988427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b55a86dc-1b99-4ed9-ac79-b745e98e55dd/31742741480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c490515-2ba0-4913-a901-553ea1126be5/67450243189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b628663-57ec-4436-87b8-c88036bd22b1/dedarumabit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853980f7-4c24-4a66-9305-492a7890d5da/caracteristicas_de_los_personajes_secundarios_de_cronica_de_una_muerte_anunciada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be68c1e-cb19-4bb7-a3cb-ec8a348c3bc5/pioneer_deh-p4200ub_bluetooth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7aa480e-5dc2-4ee7-9df4-271a73c39dac/james_dash_patterson_net_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7cc9818-9f9f-4723-b0f0-5fd7ea57c0c9/arduino_uno_r3_atmega328p_pin_diagram.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10097 5012 bytes
SHA-256: 1bbe01d73fca6ee66edba221a4d284c86c789ce0fd0601dfcac98a2cf2c51861
font_01_sfnt_off000111b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B5 11704 bytes
SHA-256: 32f54a2ddd13b9902c9fd49e5c43f28dc033f5f26613e963d5dc87a111d1303c
font_02_sfnt_off000138c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C9 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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