Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ec9594139d12c7…

MALICIOUS

PDF

85.0 KB Created: 2021-03-20 17:14:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c23ee58d8bdf1b6fde79fecdb3b27c50 SHA-1: 117e8ef0e019c7f7e06c0f3aa8365b4328631b03 SHA-256: 03ec9594139d12c759a6ad5c19ec0a8dadbb287682107a71508cb0d122a7a4d4
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with many pointing to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/strik?utm_term=best+bible+trivia+app+ios PDF link annotation
    • https://zozizifubigidoz.weebly.com/uploads/1/3/1/4/131409074/jotuberavaburukiro.pdfIn PDF document text
    • https://rofexelugikovu.weebly.com/uploads/1/3/4/7/134732340/2160838.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdfIn PDF document text
    • http://xupevagadozojad.22web.org/tekemiwaxezamogilevu.pdfIn PDF document text
    • http://sorumokujegir.iblogger.org/caracteristicas_de_la_familia_anacardiaceae.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/yhghbii/punjabi_movie_near_me_now_playing.pdfIn PDF document text
    • http://gurotazejo.22web.org/93301054737.pdfIn PDF document text
    • http://numufubigefak.iblogger.org/rapesaliraxoguke.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/TfCH3if/74453825010.pdfIn PDF document text
    • http://gelchlen.fun/how_do_i_reset_my_hot_tub_heaterias3x.pdfIn PDF document text
    • http://itsamorem.com/bokibulegasu1969a.pdfIn PDF document text
    • http://pewagupudasita.22web.org/mifejukejiwuv.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/bBmEWjd/antique_tractor_pulls_near_me_2019.pdfIn PDF document text
    • https://widafesisitix.weebly.com/uploads/1/3/5/3/135321065/8477306.pdfIn PDF document text
    • https://cdn.sqhk.co/boxumiza/geji87c/xitodap.pdfIn PDF document text
    • http://goodshopsales.xyz/21571942290taej6.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://xelidamos.epizy.com/abstract_mathematics.pdfIn PDF document text
    • http://denefarow.rf.gd/expert_systems_principles_and_programming_4th_edition.pdfIn PDF document text
    • http://rabopusafat.epizy.com/48259784040.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_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 4744 bytes
SHA-256: b574c247fb26203e647fb2644552db86f6ec296bd764f0a80136669472499805
font_01_sfnt_off00011148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11148 11188 bytes
SHA-256: 6305cccf500fcf7ee0b572ba446018a69453554d94767c73f823b248c2f83e85
font_02_sfnt_off00013797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13797 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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