Malicious PDF — malware analysis report

Static analysis result for SHA-256 c70fbf820be0c54a…

MALICIOUS

PDF

204.8 KB Created: 2021-06-28 05:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6989a679ad4ad770ec6cd788f3ce2d07 SHA-1: f43f75b6e08edab69407930139df25126bad8ee8 SHA-256: c70fbf820be0c54a28f7ec48887e52d9648b7ab9c098032fcc2de9f2fa798dc7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded links, including one pointing to a compromised WordPress upload, suggest the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and numerous external links are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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 https://pistant.ru/uplcv?utm_term=blonde+lob+with+bangs PDF link annotation
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/c23baca400d5481af77e9e6a75c33784/ledigifaxikoti.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d524f639fe5---pokaxugarewakosezaraze.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad92679e7e8---vukegoketefol.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/51ddc23d248a778a2f2198c4419216b5/41375651452.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/07b5fd7af87fe1cda74fc8a309a90c4a/32135861989.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7e4a17bae---78856132801.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/14270152883.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/79d2ddb54c07750b88738abba187b374/60027560175.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/05d3fc1a0c64c442d75f25505d996092/14593886234.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/93784854028.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/ritune.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/logewaro.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077685344a69---bosurarovaxajokoma.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160b1687d041cb---23687672042.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/fetexikuboxaliriji.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/1be66fa6969a2754f406924f4236ab63/vibufibiruponekegebesipaw.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/a07de07d0c67c6236249c84929f0e3f7/tapunafibemupabagewaru.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608593faad8dd---rulukel.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/zigexevozosixozagax.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/epc120m9h6bpvnj5luajqvcebr/kafiwiroxuzubudoveja.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/38392075597.pdfIn PDF document text
    • https://andrejc.si/files/file/mawuduxotab.pdfIn PDF document text
    • 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_off0002c98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C98B 10708 bytes
SHA-256: 6aecc3f1b05f7c4904b85d898092657eac0c3fbc72c878ebf8547f5b90f6a282
font_01_sfnt_off0002e1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E1EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002f9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9FE 16900 bytes
SHA-256: 6bdefd5b4911362c1344e0b050c33051e4390040e8dc16cd09acbb6810057490