Malicious PDF — malware analysis report

Static analysis result for SHA-256 2408a4669fac7e5f…

MALICIOUS

PDF

73.9 KB Created: 2020-12-21 07:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e805b2ba97d2e64aca20542b33041a09 SHA-1: dc2fdd90aa08f90fe2e072b928c8ed562d413add SHA-256: 2408a4669fac7e5fa3273d8e27ba5212fc4bc364459604089a52316318324f41
184 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains a reference to 'pretty woman streaming online free' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure to a potentially malicious streaming site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/123?utm_term=pretty+woman+streaming+online+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408712/normal_5fd1658fd5df7.pdfIn PDF document text
    • https://fofapabijutoza.weebly.com/uploads/1/3/4/7/134713913/f348ed9e181f53.pdfIn PDF document text
    • https://mavipevawifuduv.weebly.com/uploads/1/3/4/5/134598931/disurumo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377925/normal_5fc71accb0486.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/2987289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_5fd8dae9bcfcd.pdfIn PDF document text
    • https://widobane.weebly.com/uploads/1/3/4/3/134340358/8161e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420610/normal_5fd89d08effbe.pdfIn PDF document text
    • https://sixifemawo.weebly.com/uploads/1/3/4/4/134470876/cbb5ad22f3f.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://static1.squarespace.com/static/5fc58510d49dd12447539740/t/5fcac9494b87e7790e900d6f/1607125324237/falling_in_love_2019_review.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/the_diary_of_ellen_rimbauer_full_movie_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50ae4a13a450bab0f051b/t/5fcd61a81e1a4d7de13d5b1d/1607295400216/wewibawi.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/rifezizezusokoxaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/ribavobebabedagodigen.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/lumekunazaremeja.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/cancer_hospital_architecture_design.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/54016364686.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_off0000d75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75E 5068 bytes
SHA-256: 0fc932a95aeb0636f9f2d486de2d611ff771ed405507cb574954caf144da65f3
font_01_sfnt_off0000e88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88A 10524 bytes
SHA-256: da75b1d8c51bcdac4cca91c2d5f7b52dee549d7e8d25f5e0ddde5cc159fb433f
font_02_sfnt_off00010ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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