Malicious PDF — malware analysis report

Static analysis result for SHA-256 4adfee5ff057d707…

MALICIOUS

PDF

73.7 KB Created: 2021-08-08 23:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aa772d044fd06c7544afa4c8733821ff SHA-1: 536d9b1baa7c3c61868de14724897cc32bb625cc SHA-256: 4adfee5ff057d707299422d0063addcabed7f67ce6f563f50a7244af0f344a0e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised websites, likely intended to lure users into phishing scams or download further malware. The presence of PDF-specific heuristics related to URI and link farms supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7723

Heuristics 5

  • 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
  • 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://smidgel.ru/uplcv?utm_term=fuerza+electromotriz+fem+en+una+celda+electroqu%C3%ADmica PDF link annotation
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081e191b965f---juvek.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/2775202917.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/segutu.pdfIn PDF document text
    • http://dd-eng.com/files/files/30574941034.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/98879378269.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/66556697437.pdfIn PDF document text
    • http://ronniejoymemorialfund.com/clients/1/1a/1a75100f29d804137a154ca93ef51a80/File/57965371947.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/kutaligojesodipikodo.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/063e06dbfccabef7109e3daadd69b259/kupalizasufutekenadox.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79d79bfef1---zakuga.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/62108147508.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/tidezumuseduvebapi.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8b0695c56---vunatizabuzefibuparuz.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/f4ea9d71dc381384c7ba315a8f2f1d2e/guxoledojuvudusezetobe.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ca4138b72---75515017639.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/24185915498.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/6b1b5401cc5c5937de9df5792922b3a4/67102287942.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/kll1q6er9hccjqlb8sbhtufg7f/wolipagebu.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210517/file/48524978555.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607860c47c7d5---85858465036.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/2269774846.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/vojipukegasetawofimaximu.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/mejeratagipaxejolonapeto.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/78526273410.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CA 10812 bytes
SHA-256: cada11d396d42aa8648ce683085cde8844e625ce420d20747b9fd9076bc82353

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