Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e7de98eeae143a…

MALICIOUS

PDF

87.6 KB Created: 2021-06-29 06:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8091724f93cf86128b552573cb22482d SHA-1: 0c39e652e5d5af7a6e544c75b88c1ef1bf47e6c2 SHA-256: 76e7de98eeae143aa336ae97c5791ae26afe6abbe1f550b00914b5226b5a3407
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, indicating a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic specifically identifies the document's intent to trick users into calling a phone number, consistent with callback phishing or tech-support scams. No scripts were extracted, but the presence of numerous embedded URLs suggests a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://alexhofford.com/temp/files/file/xunejakabobewizukulid.pdf In PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/f18viod20joqkk2oej1dsebvr2/76781681925.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/jirojilefulovifiguzaj.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/bubalelilubulimonevipido.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/geditodexofogu.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/52a57f6b401357a8ddb5b91202ba44b3/30489960301.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833cfee8113---vemofividepe.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d94346592d---55172878495.pdfIn PDF document text
    • https://lesura.net/userfiles/file/61320128518.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/vuxodibujixoxesa.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/66696221664.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/bekefuzavozu.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/88845880365.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f78c30d9f2---68897086814.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/pafuremejipafafo.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/7801e63c454bdcf8e4fcc805d0808105/88914212138.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dbcc7df34---nopisajenuzinajimokow.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f30a0405d---55048146351.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f6577bfd5---63098669937.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/gukamorubisokusiga.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/43e663e5ccb32670a0105feba926b32e/fomabigebukufod.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca82949c82---44384455389.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d07f49e979a---41772324072.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/95596537946.pdfIn PDF document text
    • https://hifi-markt.eu/kunden/kronhardt/ckfinder/userfiles/files/kobiwiratire.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/74980144748.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=toyota+2009+camry+manualPDF 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_off0000f050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF050 10588 bytes
SHA-256: 27c69ecb5c80eaecb251a722769e88860a1cab987647552deaf5badefb4ad4da
font_01_sfnt_off00010897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10897 18928 bytes
SHA-256: d279bff1048bda5ed69e31cf0fd6bce05041a157460061c2ea85b2d7aced9ce4
font_02_sfnt_off0001390a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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