Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca3b1030fc38bb5…

MALICIOUS

PDF

75.3 KB Created: 2021-03-27 14:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6691e80c27bdcd14e0f52b3120c84ebe SHA-1: 20a1ea559a49bcfeb9367fc0a0d4fef165d8a7bf SHA-256: 7ca3b1030fc38bb595b71b9ac8bcc71f1774714532e9b98bfa7441ce22e313dc
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of many external links and the overall detection profile strongly indicate malicious intent, likely involving the redirection of users to compromised or malicious websites.

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
  • 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://kuzutuzo.ru/strik?utm_term=how+much+smart+board+cost PDF link annotation
    • http://eeeeeyyy.space/azar_apk_mod_gems38j5w.pdfIn PDF document text
    • http://trelon.fun/sitozewixupajakeganewugav7gnu.pdfIn PDF document text
    • https://pazisurezufil.weebly.com/uploads/1/3/4/5/134594691/1e743e8a497c.pdfIn PDF document text
    • http://future-techno.ru/rae_es_diccionario_panhispanico_de_dudas_appendices_abreviaturashdfbp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386347/normal_5fc5b1a9a1510.pdfIn PDF document text
    • http://yesnutural.space/jodexubuvuguzotomolbx2az.pdfIn PDF document text
    • http://getdouche.xyz/ibm_selectric_typewriter_ribbongund0.pdfIn PDF document text
    • http://fsbsiod.com/milady_cosmetology_book_chapter_29b73bb.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/moxipoluno.pdfIn PDF document text
    • http://idealsit.space/frames_of_mind_the_theory_of_multiple_intelligences_by_howard_gardnero1bpi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445101/normal_60073680def4b.pdfIn PDF document text
    • https://fuxilidunud.weebly.com/uploads/1/3/5/3/135314653/400685.pdfIn PDF document text
    • http://texno3ua.com/how_to_pump_using_spectra_s1jbvps.pdfIn PDF document text
    • https://pewituzusab.weebly.com/uploads/1/3/0/8/130874049/9686870.pdfIn PDF document text
    • http://italysummer.fun/33819112616mht4j.pdfIn PDF document text
    • https://genepuxomo.weebly.com/uploads/1/3/6/0/136053587/wulotumodiko_vepinotudajozi_binux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bajuse/esc_guidelines_cardiovascular_disease_pregnancy.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/63865931679.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/15960877421.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_off0000e8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EB 5340 bytes
SHA-256: d2b01905831c2b3c5b89ff781fd200ac9ea5536aa55cbb1b37cd0930ca3ff3d4
font_01_sfnt_off0000faf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF6 10936 bytes
SHA-256: 3b7269a3b70309757f5b24456e4612b055d68526f7fbef3634509994638ef0bd

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