Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f220b69f714d170…

MALICIOUS

PDF

90.5 KB Created: 2021-09-10 02:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2035e338c80d32c09e07fadc042a3fc3 SHA-1: 5e7888be884782cf4bd3487bf8261a5850db424a SHA-256: 4f220b69f714d1703e1448abf86cf98fdf520b7ef10d281d3cf191133a38cf94
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, suggesting a link farm designed to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/2678e0b7a1c04ac830742e544748de94/9068954478.pdf In PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/3120798971.pdfIn PDF document text
    • http://birdwatching.sk/media/file/vafubisixugufolujanoker.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/tazuvabugutezubabo.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/jekuwebulefetipe.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202109091813054598.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d5d1b15df---lajujejejewotunub.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109061555358771.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ad1a63db271c23471719f0f305ef008d/84248545684.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613a88208dd98---43007622387.pdfIn PDF document text
    • http://jpsacademy.com/slbdavbatala/userfiles/file/fetarajaditirugalasuzuxe.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/jatapifokidebajezuwedowi.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613999e7f2db9---mozunefov.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/letodigopogix.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/rebejabiba.pdfIn PDF document text
    • http://domkomplekt34.ru/attachments/file/78462984536.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/65444347376.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/65418056359.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/jamekusolexexudu.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/xezijadoduvojelotofe.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/kajulexetodi.pdfIn PDF document text
    • https://yantrasearch.com/ckfinder/userfiles/files/dekujimoduji.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/be1142186ab07bf07dd16d84eba705be/56174899735.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=gameguardian+parallel+space+optimizedPDF 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_off0000d91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91F 16180 bytes
SHA-256: c0217721a1102ad1f8a8ff5461faadb02f26a3634bfe128d67f68b25b112ee8f
font_01_sfnt_off0000eec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC4 21864 bytes
SHA-256: b3f1bf8a0052d08f59091a2c4cddf8c90d1233d7077e351e8361387ea3cc3e32
font_02_sfnt_off00012868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12868 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001407f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407F 11056 bytes
SHA-256: 08a69e393c49fe5655388d873b1b6b1fe4e6d551eb6662d07a1f3d48e1f97f20

Open this report in the interactive analyzer, or submit your own file for analysis.