Malicious PDF — malware analysis report

Static analysis result for SHA-256 c332694802fd91e8…

MALICIOUS

PDF

81.6 KB Created: 2021-09-14 11:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 702828820bdab35267d86b14ea9bb1a7 SHA-1: 0c9eb6dd3d2792c62e8fecc30218a209a1e6c218 SHA-256: c332694802fd91e89f45feeb55f24077d07104d71ad9c3b9110f20c6bd9085ff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=gta+v+free+mobile+game PDF link annotation
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/juroxuji.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/xigujuwikimalemuz.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/45143528078.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/jofumoxewabesuxez.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/zoxedajakimixatixipobi.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/69946427608.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/fulujapenumojaxoweluwi.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109042136077373.pdfIn PDF document text
    • http://life-worldwide.org/assets/uploads/files/zunezifajejokoratekiwufi.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/jagezarulemubudoxoguxe.pdfIn PDF document text
    • http://lavalnerina.com/userfiles/file/madowuw.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/84324932992.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/2766rl0dbjmbmnl9umvs3gavu6/36060941402.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109121747207741.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/89431547872.pdfIn PDF document text
    • http://yhbinternational.com/userfiles/file/86773285289.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/88339546742.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/60124858071.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/mezezevexoneteke.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/soxajezigu.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/mafid.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/72089625574.pdfIn PDF document text
    • https://www.casestilistas.es/ckfinder/userfiles/files/wenolaxugiximiw.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/3208729758.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB93 10528 bytes
SHA-256: 60de24721cbf7268c034952c84f100614fb64062fee17cfecfa2f7397dddcd94
font_01_sfnt_off0000f3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A2 17396 bytes
SHA-256: d5c71d1695822fb8a9a73f08863eb20270fb05c9d6d7fa8a9f0645b84b05294d
font_02_sfnt_off000120b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1