Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2002d35031c917…

MALICIOUS

PDF

94.1 KB Created: 2021-07-01 10:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: fd09fd72eac66597a189d345812507e6 SHA-1: d6078540748a079927b582c02253c4dc0fa38d0e SHA-256: 0f2002d35031c917ecbf3c271ab75bce6fc28ae103027331b8aabf7340e1cea1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs that point to compromised WordPress installations. These links likely serve to redirect users to malicious sites for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1247224dcc---98810002637.pdf In PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db499704ea3---guvuxidagonevuvanelujeb.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e0c607fe8---57720412767.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/29227097366.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/38067652234.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c649f404ac5---kogovexa.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/4fjouk7a424dfkn7vc7i4f72i3/61007572164.pdfIn PDF document text
    • http://954move.com/clients/4890/File/ruruleluvudapafabuberar.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae208dd445b---58483994547.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/40908208487.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e3c609d34---xomoxafune.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f0d3ea875---paronusutaba.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad42efa8a03---72064200326.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/c98888c1a8c4e399fc4ddaaafd39eebb/zelazowakisevisimudofiwo.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210624204212709696004.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/f0d37d628aa42184cd04158990db03d5/59767618037.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ugread0d7213lesg47n6b4o480/lirefox.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/gdvff33fpgn9i3v53v2uunipue/jepipuvukifutaxatitewateb.pdfIn PDF document text
    • http://cuacongtrinh.vn/upload/files/sosuzovunamojisinorafip.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/3c55ace6c96fb62510d94979884b1647/rizofuvuzugemutozu.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072ad365df8c---welejavenozenuj.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/e78844b62fb23525000d00d1e9b2e98e/6512417005.pdfIn PDF document text
    • https://cupanghitam.com/contents//files/32756461565.pdfIn PDF document text
    • https://actor-conseil.com/files/file/wasibukakoxerijitutezu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=what+is+star+format+interviewPDF 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_off00010d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D91 17432 bytes
SHA-256: 3f79badf5399fe5b5d47ede1b91c8f89a3ebda213e04b5af8dfc248942b61994
font_01_sfnt_off00013ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE6 10580 bytes
SHA-256: a6db6fb562f25a67e9f4db66cca6bb275e4a76e528aad61f9fffd04b2ebae4ae
font_02_sfnt_off000152f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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