Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfbf85f897c3ae7d…

MALICIOUS

PDF

73.4 KB Created: 2020-11-29 16:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d88c09eaf95cba12ec9f3aa54bf7995c SHA-1: b9f680d286813acc6d59d37af380a405043997b4 SHA-256: dfbf85f897c3ae7d118db8766114603ae260892967b5014c7572cb25a68cfb7a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/123?utm_term=summer+bridge+program In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_5f8abdf2a3b89.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/zuzefibuwik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c36d1ca9-02fc-432b-9222-154b5daef18a/banojopapakorijewabobar.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/vidmate_video_er_for_pc_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/cool_math_games_platformer_mixtape.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/snes_platform_games_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89480fde-d4b5-4ce3-b9aa-fe79969855ca/gexup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298205ef-ef42-4fc3-816f-d5d36d2954c6/lutejopajunanuwunujuvek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/267259bf-0885-4322-b156-40e3d8740b06/25264985767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7277400-8dba-48c7-b261-268b08776f27/38392509964.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFF 5312 bytes
SHA-256: 04f78b6596fe15d7e507f03091a3f94d946f4cb971aadd6283b050d9495d6c74
font_01_sfnt_off0000dcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEE 11104 bytes
SHA-256: 8cd62785a5051cb39154928e39b728a5f08c6c4b9d6556edcbd23cec100c7495
font_02_sfnt_off000102ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AC 16448 bytes
SHA-256: 4972c892cf783310df7ebe7a43044f7b4e4d650808add06809858f2f0e6eeb09

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