Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce87979f925a632f…

MALICIOUS

PDF

76.7 KB Created: 2021-06-07 16:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 72dab65c6325c6100000731d1a4824fd SHA-1: cee6b2a6364216c3833dae0e994ec5e40a602658 SHA-256: ce87979f925a632f41ae13ddfedbb9319a58449c588477b4fa02c4e7e02c6d68
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ClamAV signature and an ML classifier. It contains a large number of external links, with one pointing to 'https://ketchas.ru/pbw?utm_term=mw2+free+multiplayer+download+pc', suggesting a phishing or malware distribution lure. The PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a link farm, likely to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ketchas.ru/pbw?utm_term=mw2+free+multiplayer+download+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448735/normal_60334bd5385f3.pdfIn PDF document text
    • https://tapojanez.weebly.com/uploads/1/3/1/3/131398133/6df64b.pdfIn PDF document text
    • https://paniwotipetusu.weebly.com/uploads/1/3/4/6/134614288/dffb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448341/normal_5ffce2dce79b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_606387bc5b1f4.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4381094/normal_60aff934cbecf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449768/normal_5fc73ccadf7fc.pdfIn PDF document text
    • https://pudafeborebe.weebly.com/uploads/1/3/4/3/134335494/a3d76c.pdfIn PDF document text
    • https://sodipojemip.weebly.com/uploads/1/3/5/3/135325099/0d173b008a73.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/c5615e67-2163-447d-b51c-e14ad591a79e/samsung_bd-j7500_3d_blu-ray_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb49b717-1377-4ceb-ad9b-f12c25eeca2d/xugatalufubojukiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f15cf7c-7496-4849-a59a-2eb78bfab7ae/control_systems_engineering_nise_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1376179-0f83-42ab-8c6b-e39c7d607bd9/1200_calorie_low_carb_diet_plan_for_weight_loss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a911a80f-4f3d-4663-a8cf-06c8fbb266dc/jagipejozedupunuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e4bc141-3ecf-48fd-a3b6-3730d094310a/scale_figure_size_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1840c027-bbb0-4cef-a8ab-0c7386ff78c5/monster_truck_2014_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e0c0d11-974a-425a-9833-2ef6fabd37ed/ruzofasikizifetupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1b40a5-851f-4414-b382-0a13e328cf4e/reading_street_grade_5_grammar_and_writing_practice_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/708b5b1b-199a-4976-949d-8d8902d04e6f/81169844885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23688ecf-bf2b-4ac7-ac32-08052405d320/41721494903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf9fe72-12c1-495d-a149-ed3fa1908ea4/toxegupelobaxijazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6899fec6-63c7-47c0-a8b0-45767c665e16/anaconda_python_3.8_download_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db75e7c6-34ed-4eee-b516-544a84b4d2d3/sorugoxogagad.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_off0000eed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED5 5452 bytes
SHA-256: dcca1d34fc4e021edf9587c8c2a71637b1486f31086b83a7bc6b27a10cd39cf2
font_01_sfnt_off0001017b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017B 10520 bytes
SHA-256: a7d7c18d55b33814be5d9b8480b67b75349fcfa97953372fc03caf58f1fa9819

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