Malicious PDF — malware analysis report

Static analysis result for SHA-256 416d9abd1474da79…

MALICIOUS

PDF

71.1 KB Created: 2021-07-08 02:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f46d0455d44b7a7f4def767f9e7fa48a SHA-1: 0f33978b3123f845f65e0ebcea09355c8dd704bd SHA-256: 416d9abd1474da7900634afec821fa139bd44dac8017bca721427a69508eb8c5
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload directories, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary attack pattern involves luring users to click on these links, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a25982c510a---sogujinudosade.pdf In PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/ghmnmoctqigj3q6uucin91eiof/dorawimutesamowepuz.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/eba68bdbec5cd15f6c4c8ad049b5d43d/fipiloxovosiza.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/25464623931.pdfIn PDF document text
    • http://maihome.hu/admin1/file/rotidisedukivinatogeni.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/wokijabofel.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/be64634bda19578a2015b81444c0e96c/tomuxe.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/93b787ae9e2e9a6608249bba213e7974/bemekobibodis.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/51727952637.pdfIn PDF document text
    • http://cl-pub.com/files/files/ruwixigorazomudu.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/c2ecd24315c29734a2846eb609749582/84643029482.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/movinedavofew.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770114ee7d5---tisazepupuvupoguvomukakez.pdfIn PDF document text
    • http://englishplanet.info/ckfinder/userfiles/files/luvivolugajitad.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/49252576373.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/midokazamarufosa.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/63e85c1af41284b765f31144c2363806/35192693656.pdfIn PDF document text
    • https://atl-50.com/files/file/kitukubebewi.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/mpsc8a19443n5n3k99pmohud8p/11059213798.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/mutulatojedojelogij.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fa8ee87a9---xapanivowujo.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac69960188---fijimus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=0+is+additive+identityPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E1 16728 bytes
SHA-256: 6da607b97f993888b827d8dafa4149197872e55d3909ef3fedefcb8e962a7b25
font_01_sfnt_off0000e064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE064 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87B 10180 bytes
SHA-256: 0fbf4cc3b829ee1b421f080161442b44d5ff3e74f72fe28a0d253999ed760b55

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