Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b3e24a482a35db…

MALICIOUS

PDF

84.2 KB Created: 2021-09-01 02:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e9dfc98902e66e61c6243b5cd1738901 SHA-1: f149e976f637fffd0ea4d4e60ad9803799f84854 SHA-256: b2b3e24a482a35db8d32061db029e3397a8f8b04334bf8fcb19e4aaa3c474ea2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely intended to redirect users to phishing pages or download further malware. The presence of external URIs and link farm heuristics strongly suggests a malicious intent to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://drafthe.ru/uplcv?utm_term=different+types+of+benzos PDF link annotation
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/b5491d98da6b6ef8697c122e6cca9ede/besetilu.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160da70cfd56aa---29716812147.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/72758177941.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c6d2c94e9---27600338462.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16099f067acfed---83401078251.pdfIn PDF document text
    • http://burchiellati.com./file_fck/file/duvuvumidibogaweturug.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608218d27c815---zinasevuzuvegezod.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddb9addcb9---milolupurok.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/7776f513d31cdab6f7ba075c5d51ddec/madiwuvizozef.pdfIn PDF document text
    • https://rotterdampools.com/contents/files/38687263963.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/842706063.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/luvezuwetomoninemabefa.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103d03ce3476---59740962305.pdfIn PDF document text
    • http://lianbang123.com/uploads/files/202108311246295790.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/7378673792.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/08/02/file/20210802_204756_110.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/rumajame.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1610b20171a11d---xubuguki.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/tokif.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/xuzadexifutinofu.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/dutaxob.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/ruxabam.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/36719403253.pdfIn PDF document text
    • 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_off0000e629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE629 17676 bytes
SHA-256: 11ec762bdd7ba9a0f1dd60379a8ca031826a915c6dc96ca250fd35eea27a2539
font_01_sfnt_off00011403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11403 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1A 10456 bytes
SHA-256: 5620155579120b5d06795fad32b5860cd56930a671cafb47d206e4db21bbfa49

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