Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00279d50e976bb8…

MALICIOUS

PDF

79.8 KB Created: 2021-09-02 21:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7a052743de8d81f37d7d32d2189d2710 SHA-1: 3afd8a047050adb4b058a04e6f39f657f666b9e4 SHA-256: b00279d50e976bb895836fb3b4d88171e1f9e90ffd1259950ebdb75d55684944
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URIs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c4992a7c6---84447048536.pdf In PDF document text
    • https://cissud.com/uploads/ck_editor/files/6266398379.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e2c4d196a---jisileranarosojabis.pdfIn PDF document text
    • http://intestinalfortitude.org/clients/0/0c/0cf504f131cb0201443a7bd449519f4a/File/22771076240.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082df25c5346---nufenaxuguvaweg.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/zukegosipanewut.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/94430423005.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/50512469091.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/97649196446.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/wepavofapebav.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e60bbfcf379---zodolumefupufobejowo.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/80267549596.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/lafupewemaxiroj.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/torolubizidadepagukog.pdfIn PDF document text
    • http://rc-modeller.se/images/file///kudonora.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607271a3abc84---zudusex.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/jejoralunus.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/57614938881.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/jamopovelidepev.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/domixejapa.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3d5995ab29---gakobozegafusomapo.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/78509c50ab7e9274abc6f5766554a9ff/dezaxewazivafezu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=leyes+de+la+rob%C3%B3tica+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_off0000cab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB4 20900 bytes
SHA-256: 58ff242b1c15b4287be44654c3dab9642d46dbdf9ea8c6ab2e93db3e6dc6c469
font_01_sfnt_off0000fecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E4 10860 bytes
SHA-256: 95680ef5bb1769e8eaba3a0f84efec52ce1b80f18f45e5d8980af7eadeeb2921

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