Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab62813a26d32268…

MALICIOUS

PDF

79.3 KB Created: 2021-06-11 16:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9fb9b64ea8cc5fe338e513a8cb1e4cad SHA-1: 59079dd6fb2b2b4bb7b8af8d06d675cf0deb3276 SHA-256: ab62813a26d32268f7609ea582aa87cd794059fe5176f10e2bae7f57b920610b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised CMS uploads and disposable hosting sites. The primary purpose appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8963

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://philabc.ru/uplcv?utm_term=fundamentals+of+futures+and+options+markets+8th+edition+solutions+pdf PDF link annotation
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/3tmoc4fnqh4h6sj8q9v009btb4/52158520810.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/87hgnft5v0vg808ggkdfbem9f0/86957388596.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc8d3ce919---66361229611.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/jedotepelaxexuvaxutiloli.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/ic49a0nu3mn236u4isu6tsvn89/82218345991.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/b1396a5b7d2903a71d2328b98c666bed/zulenekutawotajilewazol.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160742f06718d3---28867035550.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af6279da8c---47856892450.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f90b11a505534f1d5ab06dfd40daca3/46387412660.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/muvenazi.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad7700a791---zijitopigunuv.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/21051484618.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c25130c5ba---rasavoki.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccc7d14d7c---32633804982.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/pajirudevuxesu.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13643 2964 bytes
SHA-256: a9b06bbc6622b93448df2899201a1dd84a9640e75286bf826e26ecf5732320ba

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