Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe6fde46cb4db69…

MALICIOUS

PDF

70.3 KB Created: 2021-09-22 11:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8fb41fa373d257bbb88635b2cfa3c078 SHA-1: e5435c1519fd15faa2d42da63472285dfdcddd94 SHA-256: 5fe6fde46cb4db6934822a69da9f8e7c0400c3b7b412023c6b37f3ef10ddea2e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting it's part of a phishing or scam campaign. The heuristic 'SE_CALLBACK_LURE' specifically indicates a callback phishing or tech-support scam pattern, likely leveraging the embedded JavaScript to facilitate the lure. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=how+to+download+gangstar+rio PDF link annotation
    • http://www.petersonassoc.com/emailimages/file/mogiv.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/javef.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/fifopusamuxupukarozuje.pdfIn PDF document text
    • http://denetimmusavirlik.com/userfiles/file/95097425084.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/uk5u9n24g7i2vq3p4rmgqd7hk2/mawurujamo.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/94387523272.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/bexekijajiboduxuzimi.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/wodobixet.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614872985344a---50083123635.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfiles/file/vezogox.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/debojip.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16147413e22770---furujavifixibeg.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/bexenogunafoja.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614455d68133e---74876566.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/biwadopuzotin.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/42766586332.pdfIn PDF document text
    • http://studiotecnicodambra.eu/userfiles/files/8224495882.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/c46bc88b0cb847a56dd3c584421d1c8e/36719839020.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/20380046824.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/27766512353.pdfIn PDF document text
    • https://yam-token.com/business_school/uploads/file/gapokadidoxamod.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/wufovumaloxirafefid.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/fudise.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/bevademot.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_off0000b60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60C 15268 bytes
SHA-256: 681d9379b633d1edb5b65348c3a54f5b25cce4504b55b74d38883ca7583f8965
font_01_sfnt_off0000dc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC90 10368 bytes
SHA-256: 76a5aecf1f89eb034151522b6baa30a0fc56fc91ca70991a5f554c6fc885013b
font_02_sfnt_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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