Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee17f981d036bf30…

MALICIOUS

PDF

99.5 KB Created: 2021-07-05 15:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 404ea045906a0d9546ef64d63dcd7567 SHA-1: b6dad7098742d102f5a2775f2924426b3be791cd SHA-256: ee17f981d036bf30d6db5e89a16974bc6856a4f3b4bc04b67f22735589cd959b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb737a6756---93628075041.pdf
    • http://cleanyachts.it/writable/public/userfiles/file/xonidegunamobomim.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dba70fa5e---96956088364.pdf
    • https://colakcivi.com/userfiles/file/99611540738.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/447b9f9920ef097d5fff3a226e893d58/7443528087.pdf
    • http://canphantich.net/Images_upload/files/tulosudugogafepiximubib.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37b0085d7e---tamemozoxuz.pdf
    • https://aspaeng.com/files/image/files/gaviberifabunosub.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/19kks1dvv4vuidbhr45f4m8b4k/juburofoxafa.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160adb03ff247f---95720970822.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bddfa51a23b---93656968305.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160975d85b9cc3---kurofufigugepufigexuk.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac880151365---45352149376.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08eefd7aff---27151321174.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/nilomotodifupobedubujo.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/908fbca3d7d21bc29c677f084b817306/wapuximefawabaviwizagu.pdf
    • http://nhhs78.org/clients/63854/File/rojaraxineti.pdf
    • http://provia-events.de/pics/fotos/1/file/93171417998.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e16fca460b---20232311498.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945ff33c401---9921620630.pdf
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/53114192768.pdf
    • http://rutherford58.com/clients/5/5b/5b2824e44de76337c32dfcbc3ee6dba3/File/povokazilivasoledimiga.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=life+after+beth+full+movie+online+free
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001212e.bin
39af13b32d585b08dad4b14b6e3659fc2505ad6e615bf35c41cd5464e3d48715
pdf-font-stream PDF embedded font (sfnt) at offset 0x1212E 10572 bytes
font_01_sfnt_off0001391b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1391B 16792 bytes
font_02_sfnt_off0001512d.bin
421c49470e53fc90828eb67dcf8dd12ac46fa3ea7f89224d14695f243dbc156b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1512D 17508 bytes