Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb6f3f3422e687c…

MALICIOUS

PDF

75.3 KB Created: 2021-01-25 17:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 946e95985415d87e37d3f5819c437131 SHA-1: 3741d6e6c7797f26a9d0fa158e48da07f48eefd9 SHA-256: 0bb6f3f3422e687c6fea9d47f4beb77e432af5a72952ac9eb4f26e25cedc28d9
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 0.9998

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://yafferge.ru/aws?utm_term=alberta+ferretti+alitalia+uniform In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5feaf7c34799f.pdfIn PDF document text
    • http://copyrights-notices-helps.com/burusufevodusofoxuwopjfxtm.pdfIn PDF document text
    • http://vivadoctor.ru/vedapodefifegakabenz19le.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474471/normal_600c7245b4c43.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/azhihbO/samsung_level_app_for_pc.pdfIn PDF document text
    • http://virona.org/3025022611xuxiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_6005dd4013912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393028/normal_5fd86dc33bc15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_5fe61d81f38dc.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/UtajgAy/heroic_magic_duel_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408481/normal_5ffdf9c8b817e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454172/normal_5fe699a46e9de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409123/normal_5fc892d82fa4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zijivevip/blender_character_rigging_for_beginners_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/microsoft_word_letterhead_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/niduludowulafud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE13 4744 bytes
SHA-256: 315a7c6997a6d0d5fe3ecf90f2c9549b2b8802240ac9d08e280b927ac4e87ae0
font_01_sfnt_off0000ee12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 10592 bytes
SHA-256: d44090d69a8cdc767766bc98f5f8b05ff39b9239c3e5efe555a1f582626359c2
font_02_sfnt_off0001123d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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