Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb368c56fb90f64…

MALICIOUS

PDF

85.9 KB Created: 2021-07-01 14:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 96b1e8f99d8c5cec8386e7a47f6eb025 SHA-1: aed8ee5accff914e60889b40582bfd73d7e20cba SHA-256: feb368c56fb90f64d7a6808bcc97b5db9d270db9b7f67761fbee537af89fd7e1
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://pharmnet.cz/ckfiles/files/files/54723955400.pdf In PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/9493b1a37e23fbeaec59015a13a32375/83440110060.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/3c8iem017eouomevtj4geqqc6g/rejewirasafo.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/53918880755.pdfIn PDF document text
    • http://ecologie-energie.com/userfiles/file/pepatologufaruliso.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd66e95be7d---bagupedadoxabafisi.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728e5d9b30b---19686145193.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/tivijefejutefomipivaje.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab08656c23---bowijotulubaxoxavelabeme.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160849f69c58d0---lolorogamodolupo.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e805e3453---85967362055.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/74438497765.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/3f8f29bee730a208a0f8204401ec23c9/19948473278.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/0461e2015f0c228ec6e78364ddfc8c64/notunutilaj.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/f13f4b41a0a2d90d45ca62833efa79f6/giwak.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/44315a8d64f032d526c48dc1d609a97a/89893092731.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/089826309843fcc884e8ed46eb429802/17392046323.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/58071768325.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/mazilomugujotafose.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/97535543f3e73e4e3bd210b7500b0476/52971042237.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/204cb3cc59071bdf4b785073f45f1a6c/tuzuzemowuje.pdfIn PDF document text
    • https://invest.pl/userfiles/file/jikaxifedodagumiru.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afe4693f4f2---30285197802.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/ziriliw.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/55525589806.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+old+do+you+have+to+be+to+legally+get+a+tattooPDF 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_off0000ecf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF5 17268 bytes
SHA-256: ac48b53ddaebfbb78f8d83746c31c29fd80dbb60fd87644a6473a31cf6def999
font_01_sfnt_off000119b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B7 10560 bytes
SHA-256: 2ad1edccf9562c07ee8cb28abd500e59b79775f8d7fcd0ad33b516af06d0c42c
font_02_sfnt_off000131c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1