Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22f883b3f116c12…

MALICIOUS

PDF

82.8 KB Created: 2021-09-03 21:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 45d05365cbdb48f32cacf2742b572e8c SHA-1: 672de7dd66b4c8daa4b79e31537a4f765fba8699 SHA-256: e22f883b3f116c12c467ac5bdc708a7a50e17c437d65d54d5874fbf84ea5d151
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to various websites. Several of these URLs lead to compromised CMS uploads or are hosted on disposable domains, increasing the likelihood of users being directed to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://protectname.xyz/whoisprivacy/userfiles/files/volasekof.pdf In PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ltobj30dbe34rrl89gok41vpi2/57734415616.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c747703b4---37112921679.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090803ba74bb---95151114807.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/wadukapobibozajopebe.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/kb7dft6ubv8q2dfnoq8mqjp2h7/17195471043.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/78094110984.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c7f74ceca---23593693051.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/vofujuzelir.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/degulag.pdfIn PDF document text
    • http://gibisch.com/files/files/41095588628.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077633d5e559---wipiguxaxepovij.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/21764679482.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/rujobofuzegasorurumaji.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/4759078201.pdfIn PDF document text
    • http://nzmbc1611.com/clients/e/e6/e6eb4f38db7021b04b945082fca6026d/File/zitolaropuni.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/hf4vmaft1hace5quj4v1i6rob7/120699163.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/72927006905.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/bef2b3804f3cad1c738a590fbaf16469/12776829238.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/15340782779.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/nujitepebumapo.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/7548225325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=engineering+mechanics+dynamics+6th+edition+solutions+pdfPDF 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_off0000dfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEA 11432 bytes
SHA-256: 21834398ab725df653ff5b0613eb59140b8282d47f723038f5ce7735a39090c2
font_01_sfnt_off0000fa89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001129b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 16312 bytes
SHA-256: 265e076dced6df0d58610367f68c6b9ff143386ec93bdda838a473218340db28

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