Malicious PDF — malware analysis report

Static analysis result for SHA-256 a01ba7ecc832a18f…

MALICIOUS

PDF

76.5 KB Created: 2021-09-21 17:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bc0e0cf672d77e1675b88bca5dc1e76e SHA-1: 2d7292c44e0e7919aefc659c3b900f00ad55def5 SHA-256: a01ba7ecc832a18f86d18baf119c5b87809eb2759a13c7509e9db331df3c2fa0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. Additionally, numerous external URLs were found, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://suncitygroup.ir/basefile/suncitygroupir/files/fizesirarimon.pdf In PDF document text
    • https://isleo.com/i_photos/file/36400608241.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16138e5fde2e87---biruguzumetedi.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/65029167462.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/2cb91efdc6696156fa4330083c9ee6a3/55993124494.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/bemel.pdfIn PDF document text
    • http://goldstecq.com/userfiles/file/47024019093.pdfIn PDF document text
    • http://candientushinko.com/images/file/bopedage.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/sotifozutiro.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/fifisujuxogokajuzepug.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-09-20/images/files/bibilezexuwer.pdfIn PDF document text
    • http://kehlux.lu/userfiles/files/31316377548.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161443e18028fe---82937618620.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/bibuzuz.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/xejibefe.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147ffe9352c5---sajiguzipax.pdfIn PDF document text
    • http://kozlovka.mebel18.com/uploads/files/vuwapuxixotaruzimasarodo.pdfIn PDF document text
    • http://z500.si/files/714877154.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/59928278827.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/qo23ijkbsnakopjkk1qnc2b7vu/popogamiwitomowemif.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/68106550466.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/3968815444.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405df4d75de---50659776988.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/66081393593.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=cinema+hd+v2+download+for+androidPDF 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_off0000c810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC810 10656 bytes
SHA-256: 6907deccf2d2b0fae93b8ecf91ab243d620337f8b367d7001a46ae5d0aecfecf
font_01_sfnt_off0000e052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE052 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF864 17304 bytes
SHA-256: 1d18fcfa115bf447002af04d2c2574644229f112acf4172dd3f24baf04eefeaf