Malicious PDF — malware analysis report

Static analysis result for SHA-256 26726f266e3cbf00…

MALICIOUS

PDF

70.0 KB Created: 2020-11-17 02:01:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 33eb451e95683a50cbc03f1a75e5e7b4 SHA-1: def873e05b1d50902a1a6ab1dd8033965ccba744 SHA-256: 26726f266e3cbf000865a100c5e1e3f696d6c718139b6b7ec835ac65d7d830a9
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text that appears to be a title, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=ate%25C5%259F+tu%25C4%259Flas%25C4%25B1+harc%25C4%25B1+nas%25C4%25B1l+haz%25C4%25B1rlan%25C4%25B1r In PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/juvurunusapibipal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5fa0a839ae0e0.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/731e3444-12c1-450c-9b3b-de41df5ec40b/unblocked_games_66_3_point_shootout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d830b2d-a27f-4191-945a-a8f99b7d06ab/89950684377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cdb7426-b2c7-4947-84d5-37002770f952/87986002218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed032b23-129c-4036-8039-ebf869795922/dafixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7757b22-80ee-4284-ade0-7ee6dd530c94/relationship_between_horus_and_seth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca37adb0-2f7e-4e2c-8d5b-300e37045c63/mesibizaropi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/476470ad-ad54-46b1-87f3-704a2e691636/45786503529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d6195d-7883-4d02-a114-bd198233277f/bir_efps_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a82d36-a206-432f-9883-a6b6ce07e31b/jenetipikageta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c09f7b-1bcd-4f6f-abfe-1f12d1457538/how_can_i_view_private_instagram_accounts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c750f025-05c6-454e-b2e5-8d2e4f85b5b0/ragaragivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a35c5141-9a46-4d6b-abec-60de0413c57b/54880885868.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/kirby_manual_download.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_off0000d24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24E 5436 bytes
SHA-256: 0d3349dc2f59ef8354a97c0713483887a271743b9e5862abf0d5902e6c13b300
font_01_sfnt_off0000e454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE454 11608 bytes
SHA-256: c5c9cec1ca467e841a8c6539ae730266ba4eede84a13b2e2daea79d84060c9d9

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