Malicious PDF — malware analysis report

Static analysis result for SHA-256 74691a3fcac4c50a…

MALICIOUS

PDF

83.4 KB Created: 2021-05-05 11:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 646e994a4e03e0cd56f26f26d3788b38 SHA-1: 5400716b8ad09cc66440007a4f8f4abb592a2d73 SHA-256: 74691a3fcac4c50af45f9a6a1b6ec0afa5d7a069a793aa9e5058406f2d54f695
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://dafemum.ru/strik?utm_term=intermec+pm43c+parts+list PDF link annotation
    • https://cdn.sqhk.co/bexoninodag/jiCjf4i/23204769476.pdfIn PDF document text
    • https://sodamosubiduv.weebly.com/uploads/1/3/4/0/134012739/tokopasibu_wuzijozakuwa_xurokedifufato_wubapokawole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475580/normal_6031f9fd94ed2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384639/normal_5fef0d53d14ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385617/normal_5fe5e6ce62ff0.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/gunuvi.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/xujewo.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/eAd0gct/tojibemimi.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/pumaditunutifabagopu.pdfIn PDF document text
    • http://rotugozebowovu.iblogger.org/what_is_the_meaning_of_social_impact_assessment.pdfIn PDF document text
    • http://xaredazisom.mywebcommunity.org/treatment_of_sepsis.pdfIn PDF document text
    • http://tadajixilatu.scienceontheweb.net/98469768991.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/b2189947-e8a5-478b-a555-7eb9aa9a4abf/risurufazegiwa.pdfIn PDF document text
    • http://nisinukodepafix.rf.gd/distance_time_graphs_practice_problems_answers.pdfIn PDF document text
    • http://fojosotum.myartsonline.com/you_were_always_on_my_mind_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e895449e-bd25-44cf-b789-a4db9a042331/xunuwasozuzolamexivixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d3a8e07-bcaf-4aff-a3b1-cc7d5f277058/kinetic_and_potential_energy_worksheet_answer_key_8th_grade.pdfIn PDF document text
    • http://denakisewir.epizy.com/27876977192.pdfIn PDF document text
    • http://fidepogomuvi.rf.gd/knowledge_in_the_deeps_guide.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_off0000f858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF858 4948 bytes
SHA-256: d72607cf4e132243b181c8c23fe400b69d2163274946659ed6ac25ff9192149d
font_01_sfnt_off000108fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FC 12904 bytes
SHA-256: a831a56949e68f94f75f53a9e628f11e4a9139e4668bf791cbab42aab911ef68
font_02_sfnt_off00013291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13291 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.