Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d121cf91e06cb0e…

MALICIOUS

PDF

80.9 KB Created: 2021-08-19 06:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: b0b564f4ff038c2ebc7aabaad1cb6d29 SHA-1: b01b9455607c7b571fa236da01be759f667f3071 SHA-256: 0d121cf91e06cb0e30e20803ba5e7700ac996726c21c92f756a8a9918f8fa4fd
164 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 high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The primary attack pattern involves luring users to these external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0674aa7a87---71912869911.pdf In PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16109b6041af55---ziketuzule.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/43021912841.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/pqpom1umaqk8j7bk9pvanpul4l/16563850942.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/firininirojexelovel.pdfIn PDF document text
    • http://sparkpro.lv/content/file/77188067648.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/4fc8e43d0848cdc097579e8a30be997e/tibanidupesupajonuduvu.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/44174971670.pdfIn PDF document text
    • http://www.pilartangguh.com/file/88070530818.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/sevuji.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608110b94bff0---povezulojobe.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/50964810348.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/balebanaxupumus.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/96102364707.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/af5e6d6eb9d03145dd62fa130cd24b45/majofaroviwobodajarozifov.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ff8991dc0---46811232620.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/92378657040.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/zewukurilokibofamavovis.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/fawugoxuvigagavoxiwowiwi.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075aed911a7b---zuterejowiji.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/5cdaa2e9dae1fe0902f583d234dd8675/fudavejinorizenugolo.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e54e62293---95665475173.pdfIn PDF document text
    • http://waberry1969.com/clients/877040/File/pemorugapuzuguz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+the+sentence+for+a+class+d+felonyPDF 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_off0000d8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E1 10680 bytes
SHA-256: 468753b32c11b5e66afbf3f950d1bc5680ab8bb5a621e9fac2e1e7e0cd12dfc6
font_01_sfnt_off0000f156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF156 16868 bytes
SHA-256: c0c5d343e3b378ab2b4903ee58f78b798e74228e3ee2ec3aa1057fde9e25c09b
font_02_sfnt_off00011d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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