Malicious PDF — malware analysis report

Static analysis result for SHA-256 17098d9a0fdbb849…

MALICIOUS

PDF

80.4 KB Created: 2021-09-14 04:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 288c346037039e6691f57a869691cb16 SHA-1: b55311916170727501cd359631e1ef1a5b882224 SHA-256: 17098d9a0fdbb849861de82224d8e44f6bd71dbcc212f88b9916581f6ac1a265
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to other PDFs hosted on compromised websites, indicating a link farm designed to distribute malicious content. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam context, and the ML classifier strongly flags it as malicious. While no scripts were directly extracted, the structure and numerous external links point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/plnu6jv12fjafv6jjs8c1460l8/4081201282.pdf In PDF document text
    • https://ecosolar-energy.com/piceditor/file/dasexukobitu.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/gizubuxolekujigoxem.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/16560751862.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/faf64221fe770807c00e46452209e95a/togulelixoxa.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/25091580677.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/86954231803.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/fabaga.pdfIn PDF document text
    • http://lechioutdoor.com/userfiles/file/53851857871.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/puzaroxelafekofug.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/35116541615.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161341e7b24cf6---87617492117.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/161347b389b053---furadapurojefur.pdfIn PDF document text
    • http://papienbanana.com/user_file/file/doluf.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/52465964310.pdfIn PDF document text
    • http://caramelitos.sk/files/97659740769.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/perazejojoz.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/guzuru.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/61545495778.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/pirakiraxaruxugow.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/xamusawerawofozitevolo.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/xedipan.pdfIn PDF document text
    • http://dream-mebel.com/pic/file/9599610179.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=action+launcher+downloadPDF link annotation
    • 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_off0000d70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF21 17276 bytes
SHA-256: ad82a12fb813eb0746003cb0d6c8edaf6ef4e8eec65c40bc06ede5564a3a2a00
font_02_sfnt_off00011c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C24 10468 bytes
SHA-256: ce1c3e83294db80c87c6c3de90138602c2e917f27b71a700c5e3ef72a8d555d4

Open this report in the interactive analyzer, or submit your own file for analysis.