Malicious PDF — malware analysis report

Static analysis result for SHA-256 307fbdc9b6ef8619…

MALICIOUS

PDF

88.6 KB Created: 2021-06-28 20:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a02282feaba1f28b78f7b97a8ce527e0 SHA-1: f8142e578b88d890640046a02f047ecdb81dc744 SHA-256: 307fbdc9b6ef86191fa1717b1026fe337955d8bb0a1bbad395da38b7fc467d3d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=demon+slayer+is+there+a+season+2 PDF link annotation
    • http://bloomx.com/sites/all/sites/bloomx.com/files/36421684478.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/b9e96ce32cbb1530737fd5d210bf5d09/kutuve.pdfIn PDF document text
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/f5193b09b05d954157cdd0e5fd158ebd/delobuvuwiduwawuxane.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160898369d30b1---45896046074.pdfIn PDF document text
    • http://shosholoza.de/file/nonuropobujep.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/47533769223.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/3367d7f8f771771808bb6796742c67f1/fabizobonukojuleferes.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/15587016746.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9627572c3---86647983288.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0be11525e---pozapilipupirukujezozik.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a5e5bf61c---19815767876.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/91476216981.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/53285122552.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/59911269350.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609895128363c---jisisiwarunovevikowurute.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/55696246139.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d715e1e22e4---46453426947.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/wodudonedojamejikoniki.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/21840891811.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/83616217804.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070af2728426---wogip.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4844a9abb9b179a7e0ebab2dd8dfe54c/rowonaxizogimazinu.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/464b668edd3d1f2da9423ac0f78da2fa/12050851962.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_off0000f6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E9 18160 bytes
SHA-256: 4931901ece5535dc81481beecf0818b6947c7b6839a38aca613102b76ffdf5b5
font_01_sfnt_off00012514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12514 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D2B 10608 bytes
SHA-256: ced251e9198ea1f2ae378408bc394c5c0e60c76ed05555e72ae72dff14e72fe9

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