Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ae607851193ce6…

MALICIOUS

PDF

82.6 KB Created: 2021-09-21 06:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 03441cda21e8bd91610fc0c80ec81630 SHA-1: 9b34ed01465930cf082a8d2ee4f209605f38c2dc SHA-256: 05ae607851193ce61fee86cd890b59ae180893bf8bbf7043d1afdc9ca7fd6280
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to potentially compromised websites and disposable hosting, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this. No scripts were extracted, but the overall structure points to a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://sanraimundo.cl/dyn/uploads/file/miboxutew.pdf In PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/cb5085d8f5cdecdd8a2ad09db77b3ed0/83232488158.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16130add5002c4---56067251675.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/985833414c1aa313291dfa5505d23a85/soluwabodax.pdfIn PDF document text
    • https://thomsonindia.com/userfiles/files/dovexovinamapidiga.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/96990169731.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/8926542965.pdfIn PDF document text
    • https://jss-moms.si/upload/File/totodugovijaxezodenis.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16147ee9e56745---gonabeparowemol.pdfIn PDF document text
    • https://arerp.kr/data/file///54850049269.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/30586901669.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/pefusimexorenedul.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/rigosufososotekanefakob.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613694f71fab4---dotezevetapeg.pdfIn PDF document text
    • http://shop-exclusive.cz/userfiles/file/tipilebaramonunaretibarop.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/warutegobususirixopipova.pdfIn PDF document text
    • http://villkasz.hu/editor_up/nuxusegeleta.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/84610690972.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/dusemuduxukewewozeleji.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/49901607274.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/sorad.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/66122925392.pdfIn PDF document text
    • https://nls.vn/upload/files/vadavawimawukikabu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=introduction+to+time+series+forecasting+with+python+pdfPDF 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_off0000db50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB50 17936 bytes
SHA-256: 4e3a429685a84ff0909533ecd839fb4e27c95d42df0a31d412afddbe37206fbe
font_01_sfnt_off00010a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12248 11272 bytes
SHA-256: 3b58a1037d0b8028ea2879db8720d996dd88773be30156e882c63a07289bb946

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