Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee5d0c6e01a43d0…

MALICIOUS

PDF

105.7 KB Created: 2021-01-24 07:01:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4f771bd913324aeccdad5a9ea3e2ea2c SHA-1: 9c0c057f5077b540a4ce67cf0d7d75d468869a39 SHA-256: 3ee5d0c6e01a43d00b00398b0f026a984d472f7617f4edec449e195a90c0ae1e
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The embedded links, such as 'https://traffmen.ru/123?utm_term=pokemon+ice+beam+tm', are designed to lead users to potentially harmful sites. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://traffmen.ru/123?utm_term=pokemon+ice+beam+tm In PDF document text
    • https://static.s123-cdn-static.com/uploads/4483338/normal_5fee1ffdab7a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417543/normal_5ff2ff5a39024.pdfIn PDF document text
    • https://pugulewex.weebly.com/uploads/1/3/1/4/131406013/2065082.pdfIn PDF document text
    • http://wutigesekigaj.22web.org/misitiru.pdfIn PDF document text
    • https://dasowafajego.weebly.com/uploads/1/3/4/7/134723411/jojibo-kapolove-dusokivatofezo-valeruvi.pdfIn PDF document text
    • http://vabuzunaseridal.iblogger.org/htc_u11_update_android_9_deutschland.pdfIn PDF document text
    • https://jadipiruw.weebly.com/uploads/1/3/0/8/130814676/3d391c9a667eb.pdfIn PDF document text
    • https://napakako.weebly.com/uploads/1/3/0/9/130968915/gipilasuzo.pdfIn PDF document text
    • https://meluwirukumipi.weebly.com/uploads/1/3/1/4/131483006/jopabuxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411483/normal_5ff69dc98b191.pdfIn PDF document text
    • https://lumevukivejus.weebly.com/uploads/1/3/0/8/130874583/6828420.pdfIn PDF document text
    • https://nojoxarojip.weebly.com/uploads/1/3/0/8/130813855/2154056.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500183/normal_5fe513eac0fd4.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
    • http://kikidexawudipox.epizy.com/bevewivo.pdfIn PDF document text
    • http://kalogoraretupo.epizy.com/bully_anniversary_edition_android_highly_compressed.pdfIn PDF document text
    • http://demunoj.epizy.com/mental_arithmetic_3_answers_free.pdfIn PDF document text
    • http://wuxodevidupibe.epizy.com/bukabaragadomiwusajida.pdfIn PDF document text
    • http://bosirizowu.rf.gd/housing_finance_company_rbi_guidelines.pdfIn PDF document text
    • http://gijomifede.rf.gd/christchurch_junior_school_uniform.pdfIn PDF document text
    • http://jedirolin.rf.gd/13862635626.pdfIn PDF document text
    • http://zudosikewemer.epizy.com/mantu_chhuria_song_amar_geet.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11822 11468 bytes
SHA-256: 4c55c6f0d67f0b196e52793ebaed6ff2d0a3b0b9bfcbf975f4d82cc1a8c949f0
font_01_sfnt_off00013dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DEA 4632 bytes
SHA-256: 7c53833539911c998a9c3e9dfd6a8ee53d329103b0d6151b85fe690620777d23
font_02_sfnt_off00014d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D8A 11360 bytes
SHA-256: ce8cccac5fb0b672b091547555a461003063efd801f0bb9ae64b2973a007502d
font_03_sfnt_off000173f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F5 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
font_04_sfnt_off000188bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188BD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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