Malicious PDF — malware analysis report

Static analysis result for SHA-256 495e477f18285438…

MALICIOUS

PDF

84.5 KB Created: 2021-07-16 08:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 31358cbfb275837e455db2433f2f39de SHA-1: 40d124e221acbd6651b697d6ffc8e2f3220adcba SHA-256: 495e477f18285438d080c142bb98decbcd93f9972d837d444124a05c6fbe7a5c
176 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'. The presence of a 'Callback phishing phone lure' heuristic indicates the document is designed to trick users into calling a fraudulent number. The numerous embedded URLs, many hosted on compromised CMS upload directories, suggest a link farm designed to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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) or Microsoft license-boilerplate 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://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/1athfov46319ulg562ci4c9um2/jumogopun.pdf In PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/monewumol.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f8553c8eb---64948946718.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/fbc5897e6efd75aab50467d40d0a0405/jutosafo.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/2uh11j3v82uo4v4jkduv9qlmq1/nesiw.pdfIn PDF document text
    • https://mytopics.it/uploads/file/86862574259.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609d30ea11948---pibafisixava.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/63351992035.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210630_528B3CB7AB21DF16.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b021f2ec596---kiforadezoridakupizuvik.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f262c331b5---mizigipawarig.pdfIn PDF document text
    • https://eviinstall.com/userfiles/files/givegijoru.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/mikonalanigimaxikal.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/ka0p765vj2ph0q6a0koqupe3a4/88029501094.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/rawetuzara.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/8017028012.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c531a8d7b5f---kilitepuvosi.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079dfc01c574---84349522170.pdfIn PDF document text
    • http://www.siposferenc.hu/html/8820757980.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/rozug.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/1292388798.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efdf1a77ac---10734080973.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073b0d0e0fd4---donaze.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/bokavovetidol.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/36357137106.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=idioms+and+phrases+by+roshan+tolani+pdf+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD607 11056 bytes
SHA-256: 00c4bff53802724efa511672d2a8ee6c7ff566a5fe3bf20dc24f13b153bd7426
font_01_sfnt_off0000ef58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF58 18960 bytes
SHA-256: e92a620f09945352bdf76b7089e33bfc3637067de1e8a29b11c4319569ffb7fc
font_02_sfnt_off000121a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A4 2228 bytes
SHA-256: 44b6f33c11bcfeb085d0eaad5908f1ef89a5dd19f2aa9dff4f98a6f5e3186298
font_03_sfnt_off00012bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1