Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1ee9a0fcbc8e10…

MALICIOUS

PDF

110.1 KB Created: 2021-07-31 22:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c05a836f48589dc09b57dc9ffefb282f SHA-1: 87f85ca659edf629e77dbde73fa6aa8610dea142 SHA-256: 1a1ee9a0fcbc8e10886b99c0eecebe1ab85c634f9d07a3d3ffaba3cc42b00e51
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

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://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4dace3ab0---18563140231.pdf In PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/voruges.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffa91d3649---moketojugetelituwoxuz.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/pakek.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210726051041.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/120776872860fce92bd02f8.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/xomuwadupuvixilo.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/9a8e765b7e1c89c0cb2f3e9762b86517/26988170391.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/nimugafiwadufufo.pdfIn PDF document text
    • http://intemhathanh.com/img_duhoc/files/78497478333.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/3ad554f86c21e12939e3875349fbe4da/kaxavikifebigefuzemuri.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/pukajifa.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210430043706181.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/6f8ef3f6a753185c28d69a0bb9419ecf/gijadobegesiv.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/woputi.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/60397028892196395c0a8fd2bb32e880/pakozux.pdfIn PDF document text
    • http://trevorhannant.com/koxiwotuzewegufafaxet.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210730_E62DC095B94376BC.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/67962157039.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160832670b41a6---xizasijizuvalo.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/jitemutof.pdfIn PDF document text
    • https://5udua.com/contents//files/nezifiroxotasakoli.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/48a4424aa9a1d335a71078e76eaa5bcd/89528985522.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/365881f4d519ca7ae095c9e307352391/6786280918.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16097fef6d4f4f---20186960184.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/9842fbfcfdf111b94fb8b7975cbae968/48717450185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=marvel+super+heroes+vs+street+fighter+rom+mame32PDF 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_off000144b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144B7 11152 bytes
SHA-256: c9f7f81ac42013ccbe673d44a6559d1bbaded820c5d0210500d3b261623b2570
font_01_sfnt_off00015ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EE1 19052 bytes
SHA-256: de1862cd41babae819a039ab2c77b2b7e781702d03b1b934fdf28dc8e301a989
font_02_sfnt_off00019038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19038 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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