Malicious PDF — malware analysis report

Static analysis result for SHA-256 8817a58ee18e2e46…

MALICIOUS

PDF

105.5 KB Created: 2021-07-04 10:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9af7d17b0fcfa9e65d6f20f236a1aa50 SHA-1: f510fd4a2770e2d1721dde730e6c4eb8008f3c80 SHA-256: 8817a58ee18e2e46ff8533d555d76c8867a4fb9af554d4d739804e7dd4f39b45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV specifically identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. While no scripts were explicitly extracted, the presence of numerous external links and the nature of the heuristics indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/28875fee2328a2d0b1eb2ef04718b286/40668988918.pdf In PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708f1773ea2---65725097864.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b741e21ec9---seledodunofizusoz.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/92ccdbae59a5828acd483c7b02258e1d/lebazekomeg.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210619004245.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/4j3prvigluor7pudjh6d8m22i2/putagirilom.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/9c38df32d7d2d8fdc857f506c29830db/33329410372.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074d0d19eb18---48694834712.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160897d41b4589---nixejetojinejowasesojis.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/bamokimir.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e083ba63e7---duxesutodipuzoxu.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d2da664c0b6---47681356533.pdfIn PDF document text
    • http://conroeclassof72.com/clients/d/de/de0acc14889d5d69ce6a2e221f3e79cd/File/8851827970.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5120a5450---refifoweje.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/rezuwexugojugategolojekag.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/23489171709.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/nm7a04rh3nvhllp09h6pr6dgjs/zatifadodez.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f2389151a---88191534859.pdfIn PDF document text
    • http://hongdacable.com/d/files/51283316749.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c779032f0b2---ganifemuvutevivujasevuzo.pdfIn PDF document text
    • http://iltorg.ru/upload/file/5051166670.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/fd79756e80311f14a794b3de9cff20cf/mebavodaxuxuzepalul.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/6720b53c8a4ed033fd71762bab502f56/33888944541.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/5kifvhp6e0v2enuans67j9urgl/10316794116.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160740631b318d---89094672820.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=cells+and+their+organelles+coloring+worksheet+answer+keyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11700 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F12 18528 bytes
SHA-256: ee7734d1c957fbe047ba933edf82ed21b3206a4d5a1df4f736c22c10df33879e
font_02_sfnt_off00016027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16027 10972 bytes
SHA-256: 9282223c6d064df3164ee5e3156d43227267545a9cc15fc90780c96a51b83820
font_03_sfnt_off0001796f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1796F 18176 bytes
SHA-256: e399aeb08486a6d765ec73ed4268d65b5878957b1289e9293a6a2dd31585c6a0

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