Malicious PDF — malware analysis report

Static analysis result for SHA-256 22901dd59a07c9ce…

MALICIOUS

PDF

89.2 KB Created: 2021-05-28 04:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3f759405bf8dc126a58dc76b7e90e398 SHA-1: ed760b96b7cba8a53cf8aacc162d3cc770096517 SHA-256: 22901dd59a07c9ce54fa335e085b6a7fc284e007b83bd9ddfa8e6834cec482c1
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs and the nature of the link farm point towards an attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://fokemale.ru/strik?utm_term=barbie+life+in+the+dreamhouse+party+game+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479240/normal_5fda0b5526d0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449627/normal_605949a898f42.pdfIn PDF document text
    • https://daletapobuwero.weebly.com/uploads/1/3/4/6/134666872/rulipajodofi.pdfIn PDF document text
    • https://besukefovubon.weebly.com/uploads/1/3/3/9/133997228/natanedukuxonaso.pdfIn PDF document text
    • https://xafuzijinole.weebly.com/uploads/1/3/4/6/134667747/zoranivoxokolego.pdfIn PDF document text
    • https://peworiwuka.weebly.com/uploads/1/3/4/6/134693567/navug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449779/normal_5ffed0837030d.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/9dc52dbf4356e.pdfIn PDF document text
    • https://saritubix.weebly.com/uploads/1/3/4/5/134507132/ee2c08.pdfIn PDF document text
    • https://ranepudanaliv.weebly.com/uploads/1/3/4/0/134000181/pawalami-pudigabibofase.pdfIn PDF document text
    • https://lonomunemol.weebly.com/uploads/1/3/6/0/136082408/ba34c69d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449992/normal_5fca778883a97.pdfIn PDF document text
    • https://pedumodab.weebly.com/uploads/1/3/1/6/131637036/7799d12.pdfIn PDF document text
    • https://nupadosizekibu.weebly.com/uploads/1/3/4/5/134597568/bec24715acd.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/7e84ca1c-883c-42bf-8ec5-766b66ee4504/rajonomakoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/456cc4ab-64e8-40d4-a9b4-5f976b2d8285/bose_model_av3-2-1iii_media_center_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4755219-5ea5-478b-820d-69d6c1860597/which_brand_is_better_lg_or_samsung_washer_and_dryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a0e3658-8ed1-4e5b-b083-d25fec518262/46424712827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e516f0a-4454-46c6-94b9-1138fd5b494f/what_is_rhetorical_triangle_speaker_audience_and_situation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ae5896-438f-4b26-994f-6712b63e80d7/88712795051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af8de6da-2534-4ab7-a060-d184252b771d/how_to_draw_manga_characters_a_beginners_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314bace3-6281-4b35-9fb0-1baf93ae0d4e/how_to_understand_music_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d102ad26-fbd3-43e5-b437-01ae15e58b18/zozedokuwalubapuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1c8fa9a-1194-46bc-9aac-c144432afcf8/fipigiret.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c7562c-70b3-4fe6-ab84-598d48556bbf/17577412343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83315170-ec1c-4a47-b441-e10fb04914d4/50769750006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a3c8586-b6d5-4950-93cd-453c902d41fa/what_do_you_need_to_study_to_become_a_medical_assistant.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_off00011dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEC 5836 bytes
SHA-256: dc38275663cd8b3e5df6708a00c23383f48a6d4885573dda6ad1f4b29f405d12
font_01_sfnt_off000131b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B5 10984 bytes
SHA-256: 39ab11e36fd64e73df27d9a5f6a4238fbfbd2ac6f729810c8347cb360a45f33b

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