Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdee2fdb62b1ac53…

MALICIOUS

PDF

84.0 KB Created: 2021-06-26 04:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f47493599c8a16e6bf1587dcb3df0b7d SHA-1: c4b71a8897a473ba9412eb3c106c20a4e97db797 SHA-256: cdee2fdb62b1ac53aedefdd4ebd68778588cdda7abc8683fce53bf32c07abbd4
176 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting a link farm or SEO poisoning attack. Several heuristics indicate these links are designed to lead users to download further malicious PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/7a305cb3acd93ee27b626c11f4f7bf8b/28478770411.pdf In PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b093d5ec9cb---36249431388.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/nrgicn8vba5ap33d7br8epcoe1/55343102070.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/4ace6ea35be773d2913b4e0a2ec95f10/45318829574.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/74250595241.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/banafumezapumeveponi.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/diruti.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/98348819998.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d50886bf06e---25106408732.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/4605957606.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/a4663bc8563c5bf327f3e1a61bce7052/13391444555.pdfIn PDF document text
    • http://jkmdc.com/aversystem.com/userfiles/file/vurusugozawugik.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/bfe113133c32f93370944b324a9436f6/82275152039.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c274ec96738---13173119720.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/313a3e54c1bd581e18453fb2113cf545/silul.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/21bbd2fab738ee77f9ea643b28816de8/58008226578.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b81bfc816c8---sesaragukogefa.pdfPDF link annotation
    • https://pasarantogelsatu.com/contents//files/55733865590.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/27f70820b0b4fc41dff7e560dba76268/nelifox.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/17584592813.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/a84d4d4c0d89f49c7c9e80aa6e0a782a/74154623017.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/gigisixu.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/36805345965.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=wifi+chip+driver+802.11+n+for+windows+7PDF 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_off0000e539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE539 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4B 16628 bytes
SHA-256: 01d9d84998f8a363458964923450721b4164e56358f1057e40482c7cc7d1d2e0
font_02_sfnt_off0001285e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285E 11176 bytes
SHA-256: 05883738bd7a1d19fcf912d6285a73aa0ec880e7776112fce650ae6f6c12816c