Malicious PDF — malware analysis report

Static analysis result for SHA-256 93148b7570bb688d…

MALICIOUS

PDF

85.2 KB Created: 2021-07-01 00:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1b07cef1533006a23bc8d35d9516091b SHA-1: bf1936c8ddc5cee0fbcaf6a0da979fcf5dbc1927 SHA-256: 93148b7570bb688dfea2f0b927e25ed220f508e4f77ca6d4be5fbd7da31c29d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ba649609ebc---59750627267.pdf
    • https://master-service.ro/images/file/zujikivif.pdf
    • http://camberwelltaxi.com/survey/userfiles/files/67657508752.pdf
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/bifebexidonukofa.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/99685829d33dbf368b2093899f88ddb0/vemenepar.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071108758cff---44218947120.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/6ed429e4b273f435c69b2aef09d42294/4301926359.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/ab97b3a18754d82ec3aa5fc58d618cf4/zigizivipabopaditu.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b2453eec195---15983854574.pdf
    • https://dangeloremodeling.com/nbloom/fckuploads/file/wixojimizi.pdf
    • http://plafondchauffant.fr//img/user/file/54757531403.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/sbe491srhp68614qjsuefjj9ep/7867032589.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/df3b7c674b14df1b53e7a75dd8c9ef6c/92503958125.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/1c76a49100a4cede2d13faae75ca989e/76232478014.pdf
    • http://vencedor.coop/images/admin/file/7656734162.pdf
    • http://geasit.it/userfiles/files/15469134068.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/637f6c3b43c47af095b54e0b19e49b60/449754524.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c87ddb56fde---nesowozasidimenuvunaja.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160ab389e0a6af---6991654607.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087528febb85---zogakiwojuxozekinebu.pdf
    • http://chupanhnoithat.vn/upload/files/faxinuwuxevotitumiwujare.pdf
    • http://seabeachthailand.com/UserFiles/file/dodafogono.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=days+of+our+lives+full+episodes+free+online
    • 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_off0000e9db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DB 16792 bytes
font_01_sfnt_off000101ed.bin
49ee3ac3390491fa4032d44fa161a9a88958598c3bc22d4f473dea3e727df68c
pdf-font-stream PDF embedded font (sfnt) at offset 0x101ED 17432 bytes
font_02_sfnt_off00012ee4.bin
730bff278cecdaa1e969a51a7261bdabdeef7f966e4f91ca15c8a745229dd358
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE4 10672 bytes