Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60bce2cba14c2b2…

MALICIOUS

PDF

69.8 KB Created: 2021-09-27 13:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 995ab4e275254a5aed2e686ff51be090 SHA-1: f4eeefd96e5fce3b72a5764801f81981dbbc6523 SHA-256: c60bce2cba14c2b2c5cc1f925103fe02d5dd990057669a4270ed09b959fa5435
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick users into calling a phone number, consistent with callback phishing or tech support scams. Numerous external URLs were extracted, many pointing to PDF files hosted on potentially disposable domains, indicating a likely phishing or malware distribution infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://queure.ru/uplcv?utm_term=can+you+have+live+wallpapers+on+android PDF link annotation
    • https://sitycare.com/FCK-UserFiles/files/58665432527.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/mugivuvikuwele.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d9e9bc620---18984472826.pdfIn PDF document text
    • http://asid.rw/userfiles/file/74469224128.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/51574073786.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/fakesofebuxiluzedoraja.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/namurawuxuzomilemoledis.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/63136004957.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/pamakukevidiwinazamujote.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/lipigutubefulitijelizote.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/73161400648.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/24970756258.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/c16702e3fb709b207a2c137770470644/guposutuxufeki.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/lekumajisaw.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/88719306259.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/20458420142.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/44499463488.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/57047554139.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/54729015205.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/90721785997.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/fevazi.pdfIn PDF document text
    • http://library.nesdb.go.th/ic/admin/ckfinder/userfiles/files/rexenejajogekuraxidolam.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/65055288830.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/71521087187.pdfIn PDF document text
    • http://yksskj.com/ckfinder/userfiles/files/pebaruwibuzaseve.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_off0000b2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DD 10788 bytes
SHA-256: 8335e7633bb6d8da21b2cc9f3f4da65bc07c7291b7d128f7658d1edc3571d8a9
font_01_sfnt_off0000cbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C6 14776 bytes
SHA-256: 7e2b6156215488466921bdc31afcb694354ddc5ae5f403957f16d76a73dd7ba8