Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2a7984fbf6cb23…

MALICIOUS

PDF

89.5 KB Created: 2021-08-01 17:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2bb10c5abe99c3de8b04be45ae32d164 SHA-1: 1e13639da02847ae3b9043603343a0d129f5a5b7 SHA-256: fd2a7984fbf6cb235faa87efc1f0b14c1536c3572751253affbdcdf9d3cda4e9
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure and URL analysis strongly indicate a malicious intent to lead users to harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://angkorphotographyguide.com/userfiles/file/vimexa.pdf In PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ceb0618c0---41481669328.pdfIn PDF document text
    • https://fultoys.com/userfiles/fosipewug.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/37757457098.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/eb418c4a604f83f4a3a6bfea8da2e42d/57314731303.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080741063339---zogololafasigamomut.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a866f6a91fe---budakevodugim.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7594330c43---wugakovuwujabifof.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080b412b19c2---87097993746.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/61128297183.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105a8d60f18e---kalaxu.pdfIn PDF document text
    • http://faxik.ru/ckfinder/userfiles/files/97261050568.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97d8e7400f---gaxuloduku.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///97917265471.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/3a3486ff2ea8c1b749ad7da1a4862776/4206150691.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/55944301176.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/2483407921.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/fewujul.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/48277431046.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/jizatigebazuk.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/dududolikomeliza.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/nazidevekomejupekutur.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/0tstmogco79qu9f5dntcdn792q/62454746451.pdfIn PDF document text
    • http://findacommodity.com/upload/file/48752363241.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8cd5ad211---36400075339.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=internship+resume+sample+for+college+students+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_off0000f571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF571 17932 bytes
SHA-256: 3902fb09485455a8c1ace10b0f5a05fe79c3894072c6a7a3d145d99fc5d347e5
font_01_sfnt_off0001241e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241E 11120 bytes
SHA-256: 43804fe2d25918b712e94a043aeccd6962c56f4841533475e5408227a7d21bfd
font_02_sfnt_off00013dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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