Malicious PDF — malware analysis report

Static analysis result for SHA-256 47499ab9d29b071f…

MALICIOUS

PDF

75.5 KB Created: 2021-09-13 15:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dffd1e163469b1f48103b0770b1e4d72 SHA-1: 651efedc649bc37acbe67e155c20274da40f0468 SHA-256: 47499ab9d29b071f1a2ce627db9341ea30df357736f8e2ecb1a2e1394f1f6d87
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or serves as a phishing lure. The document functions as a link farm, containing numerous URLs that point to websites, some of which are hosted on compromised CMS platforms. These links are likely intended to redirect users to malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://paradisetourkorea.com/FileData/ckfinder/files/20210909_9013BC5BBA59FECC.pdf In PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/724a01eea14f84d6b242f2b06042aada/6048323610.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/tosux.pdfIn PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/75364680002.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210906143804.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/2760693703.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/22130528677.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613675df12732---99161802749.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/161307b9c12f7d---baxerusamezesifibopifamir.pdfIn PDF document text
    • http://gurolmumcu.com/userfiles/file/29132784041.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/0d3c8ae6e4e7c10b9d82e96fcb4bfcee/jepivova.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/bisidenirozedababatedexus.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/vewebenodus.pdfIn PDF document text
    • https://tcremich.lu/files/files/duxixugaludavisidowa.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210910_F1157D27A15AFAC2.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eea4db5b50---voduwonejod.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/61c45c9ed97b0aa2ae500ef8fe4025bb/mimebewojorulidab.pdfIn PDF document text
    • https://promtour-rural.ro/userfiles/file/1759971827.pdfIn PDF document text
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/dadekuliginamukifal.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/42144317151.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/83602397362.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/41569945957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=best+free+firestick+appsPDF 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_off0000c2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AF 17856 bytes
SHA-256: aaed177a5bb649409ae10d0c293e1affac3b32c583b996530c7fae60e797a5e5
font_01_sfnt_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001090a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090A 10348 bytes
SHA-256: 0c2884b80b831e5b03068bf532ccdcc2d3ccedf7aacb065eb014e5aab0829e87

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