Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad598af9473b4cd4…

MALICIOUS

PDF

74.3 KB Created: 2021-01-29 03:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9b5e66431034b35a7a95770717660044 SHA-1: 61ea6a2e183720b32257c5ca5e26ba13cab2c565 SHA-256: ad598af9473b4cd444089d22a3ddb973f1f7ce60583eed4a8ddbaef66ec5ce3d
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to suspicious domains, identified as a malicious redirector and a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://gettraff.ru/wb?keyword=cheap%20turbo%20drift%20cars%20under%202k In PDF document text
    • https://static.s123-cdn-static.com/uploads/4412396/normal_5ffc6bf8ab97e.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/gdhfhfK/nawikedomusimirarujakubol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380691/normal_5ff57dfd4f112.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/ibFtfhi/jefakasipokas.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/bahfjiN/union_gospel_press_sunday_school_lesson_2020.pdfIn PDF document text
    • https://sibotapitagota.weebly.com/uploads/1/3/4/3/134378411/suvin-nibaj.pdfIn PDF document text
    • https://cdn.sqhk.co/xizubutagen/gKP7gga/entry_level_marketing_coordinator_jobs_near_me.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/e883e2270e55c.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/kipiposimebaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/pulafefer/jejKOii/zuredamu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472766/normal_5fce5bc198f16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421460/normal_5fc853809a118.pdfIn PDF document text
    • https://lipuriwos.weebly.com/uploads/1/3/5/3/135325722/xariseresopatute.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426060/normal_5fe29c7289ffa.pdfIn PDF document text
    • http://menajaf.iblogger.org/sidupazej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387406/normal_5fd3bea7966da.pdfIn PDF document text
    • https://cdn.sqhk.co/zekuxemelop/hgfai6g/origami_christmas_tree_instructions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403683/normal_5fe7b1bf28601.pdfIn PDF document text
    • https://cdn.sqhk.co/jitegoji/cEifhiO/tile_stores_near_me_open_today.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://naxezutozotos.rf.gd/boardman_bike_frame_size_guide.pdfIn PDF document text
    • http://dupikupujetilu.rf.gd/android_tv_box_cual_comprar.pdfIn PDF document text
    • http://bobitemobo.epizy.com/dipusajozurenizevut.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_off0000e42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42B 5452 bytes
SHA-256: 7cbd33b3630e9df25770f482991299ed8b04e09d7e0fb6d09258860dcb922b6f
font_01_sfnt_off0000f6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 10736 bytes
SHA-256: 1a07c2f4c9d2f57378daf3cab5f031e0b044291558df022953e95b07a4c70c9f

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