Malicious PDF — malware analysis report

Static analysis result for SHA-256 3570f83ae5c649d8…

MALICIOUS

PDF

87.8 KB Created: 2021-07-13 19:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ea83e212da644542ff07fa343e4114d SHA-1: 95683bafbea3018f936cba0f3f28c27bb2082158 SHA-256: 3570f83ae5c649d8fe7f8f0e60cae4283d6604dccc1eba352ae17eaea2e37fb6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that the primary function is to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://queure.ru/uplcv?utm_term=automate+this+christopher+steiner+pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/b1b7a055a89cf6023a2a0de4dea43c7e/40473841074.pdf
    • http://dermalab.pl/userfiles/file/xakiserunokow.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6df1e1e410---voduwarowujedopuditasu.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/df0bc75ebe878bbf0bfbe280b720f477/84606674511.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3c22aec588f985bcc28fb68e6ab8657/24564383069.pdf
    • http://hublihorse.com/uploads/userfiles/files/bozarikavonevalipetative.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/52997455962.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/ifi0c739b3cm7ngapdd1isbqj1/39996617558.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba21b01d870---lobilekaborogudiwazux.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2f819f340---40782268423.pdf
    • http://toyotaquangninh.org/data/dulieu/files/jizevetixenumefog.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/f0aa3c71853dba55e338bbda4aee51a3/fisonekakulifizofo.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/194db885b9fe89713a4643ec9d9bee81/woboxirozuwopagubavumu.pdf
    • http://rochesteradams75.com/clients/7/77/774a1ed2e17b5a3c8fe4214cc08eab78/File/88065634288.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/fe8505fe60d72768b31c5a6747150bdf/40006083103.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ad874ebdf39---soluwu.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/03f9c9ecbc442cb0f3f0a4a2f4bf5f67/votolufitonararipes.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5256898cda---24012765698.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b226410639---xebazexitafeduda.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160700ed7b6b0d---39073052989.pdf
    • http://funperm.ru/content/file/peninumumefitalab.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ruuetnutucqoke4lf5ep57ca4i/80234341586.pdf
    • https://parklanehotel.asia/userfiles/file/gaxexuxujiperevevipu.pdf
    • http://dichvugiayphep.biz/upload/ck/files/kinezuxiluvorajetakaboza.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f16e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 16792 bytes
font_01_sfnt_off00010985.bin
b8d3d07ee7f23cc994c40d01ef5879613272c0dca007e7cf72e0e70a4a85a8f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10985 10920 bytes
font_02_sfnt_off000122a9.bin
0e1814277db42180e5b5c235f23e8082e94d1ec18cadcfbbae2555c121d14030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122A9 18220 bytes

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