Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ea6572fb91fc28…

MALICIOUS

PDF

85.3 KB Created: 2021-06-26 12:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56abb1bb25538d884e7abed0c5117bc0 SHA-1: 97dcfe911b7914dd164c772a4ffd3ec43c56e251 SHA-256: 32ea6572fb91fc28db1f89b380669579abe2f6cc91db9f243c29d6fd64a6eaa0
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable domains. The embedded URLs suggest a phishing or malware distribution scheme, aiming to trick users into visiting potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://webinaris.training/ckfinder/userfiles/publics/files/nuzuwo.pdf
    • http://pivotal-technologies.com/userfiles/file/nisumejojivasikageru.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160ca02fe31892---vejosoraj.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082f80ad33b7---97430324343.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/81q58junl1c59qilffu3nuk9tb/pefiw.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083001d35d3c---xagufanew.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/8c64efaabb92e66213c9ad96f22bc0b3/vufalijezewipozere.pdf
    • http://poltinik.ru/userfiles/file/gewor.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903a19bd40f---dujafomimaburobovigefadep.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cca3426f5---72225751723.pdf
    • https://arnetbilgisayar.com/upload/ckfinder/files/94609950175.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608cce7248b51---lanorixiziboguwegukobi.pdf
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/zilomufuvuvusikupalowume.pdf
    • https://betentour.com/sites/default/files/file/jujapudupex.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609025d8960ff---79070276544.pdf
    • http://cheers-gifts.com/userfiles/99345518707.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160794202768c2---99752779223.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/6k7kunlcvke7h92dd3udgs6da3/xigikivelufuxerarira.pdf
    • http://parkettes.org/clients/b/b3/b30d687fb0e6fb0c44210170e51784d9/File/kubuxekawoxeje.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffee3dc5dd---80131193923.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/2e29de2ee2d6bf39749d419c2267647f/tipameze.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/83c7f9507ac6f17228d7d9f75dd146c8/68339385352.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1249d1a25---88404128093.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b862016db15---migeritadi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=process+safety+risk+management
    • 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_off0000ecd0.bin
0d8e205113ffe87d406622eaa6de4166e84bd4dabd1f67e2f53465be95a33150		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECD0 10840 bytes
font_01_sfnt_off000105e6.bin
6dde096f22f66d12910b38e7890e4a3db1acabc5e88aaacee0d3c3fdeb5bd370		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105E6 16204 bytes
font_02_sfnt_off00012ffd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFD 16792 bytes

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