Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e4945bafdc3cc4…

MALICIOUS

PDF

85.9 KB Created: 2021-04-02 17:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 60778460fbfc790ef3fefa3a81599e23 SHA-1: 42c622bd2f4edbebc6689a0c8a0e90672cb8e507 SHA-256: c3e4945bafdc3cc471b8e9c6463bf449d31d5108ff0056102993090418381469
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to link farms hosted on disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating a high likelihood of phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/strik?utm_term=software+for+c+programming+in+windows+10 PDF link annotation
    • http://best-ital.fun/sentiment_analysis_and_ontology_engineeringn6a7o.pdfIn PDF document text
    • http://kismykeitio.best/zafitomilebaxiwawipesi5pxp8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482216/normal_60581961b9b8a.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/djiTjhV/64535654001.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379960/normal_600320a64475c.pdfIn PDF document text
    • http://nncucuucuc.space/instructions_for_disney_monopoly_juniorosm01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426558/normal_6034fc1a5a6da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465127/normal_603ba23372dc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445125/normal_603ac512eeac1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_601b5605c5c19.pdfIn PDF document text
    • https://guniroxu.weebly.com/uploads/1/3/4/5/134525914/9834551.pdfIn PDF document text
    • https://wawodedirikib.weebly.com/uploads/1/3/5/3/135348651/9642710.pdfIn PDF document text
    • http://labiosdewonda.com/988992757531h6a7.pdfIn PDF document text
    • https://regifevadep.weebly.com/uploads/1/3/4/4/134476302/wonuzaw.pdfIn PDF document text
    • http://weinmvc.net/942719277970c2vr.pdfIn PDF document text
    • https://pamiwawoxok.weebly.com/uploads/1/3/6/0/136089952/4355820.pdfIn PDF document text
    • https://dixamagajo.weebly.com/uploads/1/3/4/6/134652312/e5d716fc08c7ad0.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/eQRPjhq/new_english_song_video_full_hd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_602b62599035b.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/ahgiejb/58340346911.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/bomifabipi/90830533367.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/90876463083.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/vajudixonevazopewilupuxi.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_off000100fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FE 5620 bytes
SHA-256: b9e0982ab5848de6bcc18bae17251377a3604e0cc10df5181c4f6c6fc1e9268c
font_01_sfnt_off0001140f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140F 11644 bytes
SHA-256: afd538376c62d7e1c0c2f4e4fe573216720f917546fc23e5b84fe25bb66af105
font_02_sfnt_off00013bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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