Malicious PDF — malware analysis report

Static analysis result for SHA-256 7630293fc667f30b…

MALICIOUS

PDF

95.4 KB Created: 2021-07-13 21:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: abae4ffe7509cbef467f401474469ac2 SHA-1: da11f76fb958405804a6f83e6d7be0cec9d2b86b SHA-256: 7630293fc667f30bb24524a6b5788ffedb3fb888e2ee5f42193d13f504598c29
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many pointing to compromised WordPress sites, suggesting a link farm or redirection tactic. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document content likely attempts to trick users into changing payment details. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9dbdad9f4---39401989164.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16091643bd2e74---sorojelatur.pdf
    • http://booklandbooks.com/userfiles/file/nelotanezidinisisopilem.pdf
    • https://baobihungphu.com/media/ftp/file/36540513095.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ae4793acf---tinatezepozanajapijipitim.pdf
    • http://banghaija.com/userfiles/file/letaxejodogiwupiz.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/d14ec20c380306cb1182ac1b2a88b318/lagunomosojitotovibex.pdf
    • http://dajuicebarus.com/uploads/files/fudumekas.pdf
    • https://cincia.ro/ckfinder/userfiles/files/46352451095.pdf
    • http://chroscina.com/userfiles/file/rilosejitarewusuvix.pdf
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/1252144896.pdf
    • http://stigstudiotecnico.it/userfiles/files/nagijuwetavoledu.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7413cc1cfc---12412094675.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f737bcea1f---392994066.pdf
    • http://bjjiffy.com/upload/22295898169.pdf
    • http://acecaalcoy.com/userfiles/file/96469668374.pdf
    • http://jmk.kr/ckfinder/userfiles/files/22979626934.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa1f65c426---tomosowejufimawoloxo.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4004bc950---bemaxaluni.pdf
    • http://drapa-technika.cz/UserFiles/File/36038321765.pdf
    • https://aglogistics-bo.net/userfiles/file/boduwunabujipubapomi.pdf
    • https://aykutemlak.com/upload/ckfinder/files/95571666919.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c148a4f4db---34883064669.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/3c42d369370f32d423b8e9459a9b334d/10571914521.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=vocabulary+workshop+level+d+unit+6+choosing+the+right+word
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011273.bin
447dd32f36edfeb6d820e150e6a1e860700b42d20426ed22d2433c94a7183fe1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11273 11528 bytes
font_01_sfnt_off00012d67.bin
5af033c5d6e177f0ca6fb72bb6ec0bd5a5e2b19ff0e7cc218d6e9e0c5453076c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D67 16328 bytes
font_02_sfnt_off00015787.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15787 16792 bytes