Malicious PDF — malware analysis report

Static analysis result for SHA-256 64570d9cf1c54916…

MALICIOUS

PDF

89.3 KB Created: 2021-07-25 00:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c137355d298d6875970129752d0236b6 SHA-1: 2b28872d90e91846dde732ca7d1fb78e92762ec1 SHA-256: 64570d9cf1c549160a1275d71832e2a38baf08f5fadf87098167c43f117a3449
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, utilizing compromised CMS uploads and disposable hosting to distribute links. The embedded URLs, such as those pointing to `amwordpress.org` and `lightingandhvacexpo.com`, are likely intended to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/b2eb022d10142a233f24ce90b78aa218/47812602630.pdf In PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/2052610a8e7d312fbd418f37b87e5979/55424171553.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/86535434936.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097ecc21a9f5---manamexenizalikibesito.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/88571601637.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/mafitoposovepozuse.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/f7sq03t52q7gnkfktuifkcno84/67964456063.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4b20c78c3---seruliv.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/87379152187.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d919f439a9e---66599994025.pdfIn PDF document text
    • http://cwesp.biz/upload/file/53590567035.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021051921575973499.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/bf75e2ebffc0c4ae559655b7a2a74fc6/50415292466.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d2cf2f66b---28981423091.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/89623268299.pdfIn PDF document text
    • http://shs1977reunion.com/clients/41590/File/vapukivu.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e24683d5ac1---nilejobuku.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/44293387801.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609121d43270c---napemosiwevax.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/ik7iism6tedn19fii0ijn82e81/98246833581.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/26498049259.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086a8067e801---tabojunimatinuzuvafuti.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/2dke4ajc1volbfa6mahlkompg6/23563763327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=best+anti+reflux+dietPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF982 10480 bytes
SHA-256: 4f7b2a310517f2714ee8d8c9aaea71b888abc075e6e8818a10e2d399fafbd9df
font_01_sfnt_off00011180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11180 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12992 17736 bytes
SHA-256: b0499641f3d5bba003b29cb68f1ef961922541159d558d5099da173a6cac1229

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