Malicious PDF — malware analysis report

Static analysis result for SHA-256 d604a8ee64f494b6…

MALICIOUS

PDF

88.7 KB Created: 2021-09-03 02:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f236bdc23d303ac9ff28f4c6c476e36f SHA-1: 26a701a8e81fb8058e62077282f3944890db3dad SHA-256: d604a8ee64f494b63c89ce415a4952541e6697a53ea2ba85ea16a352803e4b0b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous links to potentially compromised websites, suggesting an attempt to host malicious content or redirect users. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or the delivery of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vansuloi.com/uploads/userfiles/file/bonewimizovuxek.pdf In PDF document text
    • http://viprealestatebrokers.com/userfiles/files/8841115424.pdfIn PDF document text
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/58262184276.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/fosudejowuxerovalezijup.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16087467126349---27968817225.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608527f410c67---zuwap.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210815192023_lrgd6e.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/74b7b46c6af3fdb83cd5791cda38265a/xokodulevoxufimitit.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608659b35b2d8---komabegadorutuxufidupomaf.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/12605486888.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/00ffe616dc0e476ab4890eca1e5d7885/4193731086.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/lavopefu.pdfIn PDF document text
    • http://furniture83.com/upload/files/muluwunemunikuxek.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d2d7d44219---42270202178.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160874c5f3b851---12809317851.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f496723ae6---26836197527.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609263d730b37---vesutaxakojetugubudag.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/zesebelomamafinixolosejik.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d19fbcc9e---99360079126.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/9520445315.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/27074715787.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/komifegiwivume.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/eb8dc632b85a117e0d2d731bc4bc9bdb/gixegagol.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/a47f77cc15527e15f9dd9bf501c7fb64/tizuninadugudoxum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=steak+and+shake+coupons+october+2018+pdfPDF 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_off0000f066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 11488 bytes
SHA-256: 75e20634a4f130d1d71dfb03c8b0db7d29ee7192666adcb1567dcb2b8fbf5414
font_01_sfnt_off00010b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001236f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1236F 19008 bytes
SHA-256: 0725940b71d2724739be7383690d5ec467659a62a3b487ac3c89cef547660d71

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