Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ae333ef2c265d1…

MALICIOUS

PDF

71.0 KB Created: 2021-09-26 22:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a649d109a53fb3fa9758f04a478c312f SHA-1: bc9f236c1c9a5781ca1340758ef842bc6c8eb5bc SHA-256: 63ae333ef2c265d1d8bf4e4057e64aebf92ab63124dda992e53d142e1fdbb05d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded URLs, including one that explicitly mentions 'mini militia hack version download free', suggesting a phishing or scam attempt. Heuristics indicate the PDF is a link farm pointing to compromised CMS uploads and disposable hosting, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely serving as a lure to download further malware or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://inwebjor.ru/uplcv?utm_term=mini+militia+hack+version+download+free PDF link annotation
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/87692321303.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/96289021187.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16146f20fe9b68---jejazubafegumumufowisok.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/63322359861.pdfIn PDF document text
    • http://rilta.net/userfiles/files/xasakizijoxupa.pdfIn PDF document text
    • https://kujainspectors.com/candyticket/uploads/page_images/files/sijobiru.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/poxin.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/0f8d8932cd8c5c1c9dffabd784d4efee/tiravemugibeja.pdfIn PDF document text
    • http://a899.net/userfiles/file/86766641750.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/161444b2bd6c1a---76412667714.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/44400945808.pdfIn PDF document text
    • https://ln80.cn/filespath/files/20210922172222.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/70678956837.pdfIn PDF document text
    • http://gusanhightec.com/userData/board/file/1673723622.pdfIn PDF document text
    • https://sangolongphuong.vn/longphuong/news/files/tojebariwu.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/livelofazudab.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/ab4395f3bf87d9d77460b7837894f44a/10826137383.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/72754910981.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/6319560407.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/vatumuradilovewo.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/fedete.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/felejuwitoxonuno.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/4562319035.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_off0000b2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2CE 16480 bytes
SHA-256: 26491bbf552cf99f29522d502bcaa755e24383168635c1aa72de05244eba558b
font_01_sfnt_off0000dca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA9 10980 bytes
SHA-256: ebb5a749ddd1d2700ae912e98bcee932c4a7821e2eb2de280ee24a14ad62a71b
font_02_sfnt_off0000f602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF602 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1