Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6c575d8f8da7f3…

MALICIOUS

PDF

54.0 KB Created: 2021-09-05 04:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: dc3b3a5d396053b46b42de993fd1cfba SHA-1: 290a80bdc0d71f6b29867cffd9506348f2aa1a09 SHA-256: ba6c575d8f8da7f3bb164b940fffa47911f5900c97b597c4d5a5e7efc5cea9a5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and contains numerous external links, many hosted on compromised WordPress sites or disposable domains. The PDF structure suggests it functions as a link farm, directing users to potentially malicious content. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to redirect users or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4912

Heuristics 5

  • 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
  • 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://catamma.ru/uplcv?utm_term=shimano+nexus+8+service+manual+pdf PDF link annotation
    • http://haozuowenwang.com/imagefiles/file/55917075808.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/10c51fdd0b8651a81e7e5940600bb356/14126911884.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/latimitixijemi.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/tadoroje.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/06/09/file/20210609_055452_189.pdfIn PDF document text
    • http://nessium.net/userfiles/file/gojev.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/55619637725.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16081741d81af4---loduzewilutopotekumi.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a06df55a26---rulugalo.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/8827c84d78c68ceadbe709656285c0f4/37586731592.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/qs3du6863l28vf0l36pav3kvv4/64937915155.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/47022551483.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/bd6a4622c23cb790aac7a02da9fbd36d/97834817825.pdfIn PDF document text
    • https://bientannamhuy.com/wp-content/uploads/files/jitekagikax.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f6bac3c74---mozusekegidusigaralonop.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c60523151d2---jixujuwekupadiganepe.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/d8172171f7547b48f6cb211b72d44226/keludizabu.pdfIn PDF document text
    • https://rosycaffe.com/file/14888901862.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/39913480819.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/43brc2gccjpkal5u2remi5fk82/59680673623.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/66169658934.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083059c489a7---zimifasixetekubigokikavu.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/38994911397.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/760c4c0241cc865bde7ec385815cb6f1/jinadezoxev.pdfIn PDF document text

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