Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3ca32597170d83…

MALICIOUS

PDF

164.2 KB Created: 2021-06-25 20:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 421bb09e23de13617b403e77070689f2 SHA-1: 0da1ed436be0b0ff200359999339303f40299e53 SHA-256: bd3ca32597170d83f4f58d73a5e5a6532677499362c6f2b575e2e818c8c5bc68
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of form plugins for file uploads indicate an attempt to obscure the final destination and host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9733

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/22842fe809a3015982c9e0f86e2eaaf0/nofolu.pdf
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/58225672644.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160775f474ac6b---99297083585.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/ldbrm8js9ondl0i56l7kgmiovo/56290490966.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/p2fotu5cuj1q4ak6tv67mhq3i7/sexogizun.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e40d6638d---dipoxizivetenigibopazuf.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b73daca7---30242300053.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/b928edc97f986d2024b8d06f5d5de7d6/18581780781.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72659d3c04---73770853191.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2345cf9d7---lojazobutipavuxuwovugu.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/9bfdc4f3a23b586512f4018ac5c3b21b/rozikuduwoduwozujomovogir.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b16d51f29---52343746077.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/sqdk7irmqff1bfkpjmpc6l2287/tolovusetalokujuzep.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/af4cbde68f0a94d7907278c4af4a10cb/74487495735.pdf
    • https://marosme.ro/hirek/file/wunapesasapo.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/d8cec847cfcb576679cc7763c9543c16/62856701788.pdf
    • http://detskaoptika.cz/ckfinder/userfiles/files/8271340636.pdf
    • http://roycraft.ca/userfiles/file/vexawatofebituvovabari.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/386e5f6d6cfb9239d6b8c1fc6914993f/92789604831.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083862a2367b---dexubimorewija.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/ed083df54d1a0bc910839603c45d4479/72936954959.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/uqmvd3k0jd9rjjsfsflg2rhlam/74688184243.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/67121a1de16182536315521a3034d971/35593361829.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb1ce46067---35627858977.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/9cc6bb7ed4aff72dbc111731b0fab5ba/86900367261.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=beauty+and+the+beast+musical
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020e1d.bin
1c4476548ec3cdf08bd8c27bfc07c5007488459149a6c87cf1ca3892939dd94d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20E1D 4580 bytes
font_01_sfnt_off00021f0d.bin
dedf70d87e86fa1281d9572dccc6df9e359ed6eea6052dae12fccb8eaa96d395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21F0D 10820 bytes
font_02_sfnt_off000237cd.bin
842610af2b07fca44d681e729a8f37ee3d03d399c589c9d15187af9ce96dcab5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x237CD 20060 bytes
font_03_sfnt_off00026a59.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26A59 16792 bytes

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