Malicious PDF — malware analysis report

Static analysis result for SHA-256 65fd3f4ea2d805b5…

MALICIOUS

PDF

66.7 KB Created: 2021-04-30 02:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 910517b63fca7037cd1e86848e278a78 SHA-1: 7bd93e55a28b3e8a86672788b624c16c2d30a16c SHA-256: 65fd3f4ea2d805b5d70505654ad966b6a8036202eac0d958d2eb7ce8b2041ac8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains references to 'Ayushman bharat health scheme pdf', suggesting a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9701

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607117d4a57cb---vuwunonekajaselewufavodam.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//51743912651.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/43b2893f39b1b004d8bad427a0e5529e/42262301796.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078549f2511b---56588622098.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0a549e94c---1531850373.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ea522182d---72066266593.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/2446aa0c901f6c5230ba5bb2eca67f06/xenefetawovuru.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce623b1f06---59384415868.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/41254f9d01910307c4d30901535b43f9/16651853539.pdf
    • http://alibabashipping.com/userfiles/file/99832303796.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606e793b99d5d---72596915396.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/atteofdvkfd2r0l7e5hqff5aa7/70324723570.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16073e2eac57f6---bexatutotexukekenagakagij.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d1de960a9---gunetepezasofasevekagis.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/h6griimhsv06ml1mj15end2ii1/63465030177.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/51203853050.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160879e7bb3b53---repevedusejolunev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=ayushman+bharat+health+scheme+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d21d.bin
d66b09659fda91e4b554556c38a78e79ca0a9f6b06487475cdabe9f97f961daf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD21D 5628 bytes
font_01_sfnt_off0000e515.bin
ef27797c0822a4fc6250d8b726e5fa89cb72df4bc1bf3bc4750f5227101e47c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE515 10388 bytes

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