Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc4b5091c4130ff…

MALICIOUS

PDF

79.8 KB Created: 2021-08-20 22:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b29822f7b7f70e8eb07285011ecff1be SHA-1: 742f1570748bfaea8959a91232c4bc8a24cbe415 SHA-256: ccc4b5091c4130ffb839469487147433f30fecfc823ea22f400d17de4f2bbc8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous URLs, some hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL analysis suggest the PDF serves as a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xn--80aikni6a0b.xn--p1ai/images/file/fozipejugif.pdf In PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/80099437a0983610aeca13439b50b078/9479559550.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940a3c3749b---52553193264.pdfIn PDF document text
    • http://budka39.ru/files/1247903814.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/fabugabe.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/notikenebupuk.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfc893cdbd---92767721730.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/xanijiwozaturowojakone.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608db92a02896---56835225673.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/48520057798.pdfIn PDF document text
    • https://promise-land.com/upload/file/newezumabawoko.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/55671145068.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/b1aa8577eae61665132d38f759d7b43c/38844517039.pdfIn PDF document text
    • https://castel.ro/userfiles/file/91385328474.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/vaziketanix.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/72eea70b185850fe654f6993c7d19164/41094762799.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846025016ca---rofipolaxubex.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/69aed1475d5e77374cb2b9c80bd0caef/xakubemamuretasevufabe.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/88476948731.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/45715528670.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6a3c28c45---64849366175.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/95326525878.pdfIn PDF document text
    • http://saydersan.com/firma/files/79890295760.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=kubota+l1501+parts+diagramPDF 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_off0000d300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD300 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 11036 bytes
SHA-256: a9a0c9993db09f13d31cdceda4d6d49180228aa25b501144c99dfba026023e48
font_02_sfnt_off0001046e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046E 17216 bytes
SHA-256: b768f374fb13aecc172c8352c4c09aaa32a921fe15937693d98e7a58d4553a1c

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