Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec6e8ceafaf19d9…

MALICIOUS

PDF

213.8 KB Created: 2021-07-18 16:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b131214817087eed2246fc0bc3f4cfb6 SHA-1: 04a8e79ccf16f57aab726eb9d791487d112c9daa SHA-256: 0ec6e8ceafaf19d94ef2728396e47cf0b1dd9c1fdd5c74bb4ecd4280f58c3358
126 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to compromised WordPress upload directories, a common technique for hosting malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable, but the presence of numerous suspicious URLs is sufficient evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

Heuristics 5

  • 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.
  • 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://vasvaripalmuzeum.hu/upload/file/98602270954.pdf In PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/78233267603.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d1b2ee8678f230dbc10cbe9af8d6c7bf/pegarizupo.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c110ed6d79---98980677156.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/rimifogajoxi.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/wezaviniduwoz.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/kakulizefejo.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607267aa78a74---85553610570.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/3368264860.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160950fe7028f8---ranumuwekit.pdfIn PDF document text
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/24089798511.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/52610193645.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16092d2656f529---93726375464.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/30967120387.pdfIn PDF document text
    • https://ilcaminodaugo.it/file/84504542720.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/cfeb6ba945aea88e9e827a4a8c757ffa/zevakuduvurezaririra.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/d8889a3faafa90c487b1460fb843f324/nowegowi.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786b3e34421.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/2efbkhols1qkoc3klk0cv837fo/17135925498.pdfIn PDF document text
    • http://sbkf.org/files/files/benadutowa.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0e685397f---19124231231.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/tukebatojuritate.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/wiwewut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=love+conquers+a+multitude+of+sinsPDF 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_off0002d531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D531 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002ed43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED43 31484 bytes
SHA-256: 5e8a3d470fd06a635525c5b38e17a3f004ea03182e52049cb9ae37ebd65d45a9
font_02_sfnt_off00033027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33027 10904 bytes
SHA-256: ad0cb7ebef207d155256c6af6f3d0c1d18adbe9c645b5827d06ccd65c52d60b9