Malicious PDF — malware analysis report

Static analysis result for SHA-256 15bf22e4ac73141e…

MALICIOUS

PDF

57.1 KB Created: 2020-11-11 18:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 00a8105d97f0ef63e7a5f5de9ecdc30b SHA-1: d4f0c0b4d7a884bc252dceffd5cc40205b81bda3 SHA-256: 15bf22e4ac73141eaf2c50cdc0b90cf7eedb2bdd46293888bd700d8af343c003
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. ML classification and ClamAV also identified it as malicious. The embedded URL, 'https://ggtraff.ru/strik?utm_term=imagenes+de+juguetes+tradicionales+p', is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?utm_term=imagenes+de+juguetes+tradicionales+p In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_5fa0f77c82acd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_5f9cf3993b079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f880a9831d0f.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/vitobeniduz-kudiro-datedixav-vowuxikav.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/0b15a30f-817e-405d-ac72-cab7275b0d52/runovonudikiwapaliled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505d7013-8d6b-4608-a0a0-5ea097cb7a08/laxerimirono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26aa329b-e5d3-4349-b0c8-917d43f1a5e0/13213354719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d01ede-2815-48c2-8a7d-68954e158260/23231988322.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/xodedevifipobubunagovalog.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/retribution_paladin_pvp_guide_classic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/256f70e9-f9f9-43d7-bbf6-e1faa2eaca31/late_renaissance_time_period.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_off0000a6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D1 5408 bytes
SHA-256: f3ae40da51efee698d822d3606820c68c86a4b46bb7c5b8bcfbf426e53f94e0b
font_01_sfnt_off0000b91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB91B 8940 bytes
SHA-256: 4a1a045e044f237175b8254ecf9fcc5a6f58749f66034332bfc2841c79e9d8e3

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