Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d020bfeef016c1f…

MALICIOUS

PDF

88.7 KB Created: 2021-08-12 18:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a9365c018d5da4b51500ca885867589a SHA-1: 5b218dfdd1d031ba0e783901d8ab05ad31ac8689 SHA-256: 6d020bfeef016c1fbcc05850b0220616c95dd67c6b7faf8d953e25c8bba1d114
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, pointing to multiple compromised WordPress sites and disposable hosting domains. While no scripts were explicitly extracted, the nature of the links suggests an attempt to redirect users to malicious or phishing content, aligning with T1566.001 (Spearphishing Attachment) as a likely initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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
  • 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://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/9fba4d2143a26ee89dac2582965960fc/bavomejirerebedezo.pdf In PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d1f27a96d---mikoledelinamefajetozasaz.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/u8ctp01drkbe45qjjr40082o14/dofekanafalesatu.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/57365462298.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bc40881fd07---4020651562.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/tomakelojinase.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/r4cbeaorfj7lnua496r0m7sast/rudagavexu.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/57bfe1c937423905d027613dff475f8a/99458708912.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/20929669503.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/7b13f5a4a94d1f36c48ee3fadca63514/xafironesak.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/32089580761.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/gipivisunafifa.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd55e403bb---45242400080.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e777047a113---vuvutadojinunebavogajaref.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/49ibkeg3gkebnkn4fdo0vousta/14653755314.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/28cctqkn2q76g80qcaddhs48qf/tolabasot.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/lanokiximosuxegivowuxez.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/razizewelimajumuviwabis.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/29875153256.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8ce8155da---80175233588.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/66649562704.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/batadik.pdfIn PDF document text
    • https://mabuksusu.com/contents//files/65169786760.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/23878169967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=difference+between+ct+scan+and+scannersPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E7 16776 bytes
SHA-256: 57873ba0620b6440c507c74db9a819825c8de54a2a290b7aceced45d8a7be04a
font_01_sfnt_off00012489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12489 10528 bytes
SHA-256: 2c2a10bab7b4c5a594334169122e61633f6306ea8856d595778c786e6fcbcd57
font_02_sfnt_off00013cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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