Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a07063fc04a56bb…

MALICIOUS

PDF

81.4 KB Created: 2021-09-07 09:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6037f0316802e38886440c27724bf7da SHA-1: e77f61b778d991b970531e92423ccde3e5dfd824 SHA-256: 4a07063fc04a56bb484b55498ad44128f8a811cf9299667aba60311203672f8c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier as malicious and also detected by ClamAV as a phishing trojan. It contains numerous links to external websites, many of which appear to be compromised CMS uploads or link farms, suggesting a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common technique to bypass security filters.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://oniceh.ru/uplcv?utm_term=como+converter+pdf+de+imagem+em+word PDF link annotation
    • http://agapetown.net/ckfinder/userfiles/files/deberoxibulovinot.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/73595533987.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ed54407de90---3486444855.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/13253036332.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/64117592202.pdfIn PDF document text
    • https://smithsgame.com/calisma2/files/uploads/sidepuvagigexudi.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/lomamewikokubis.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/39352613094.pdfIn PDF document text
    • https://gilbertems.com/videos/file/gewosa.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/2107221313442377019727m.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/dumodoturukeg.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/27752849910.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/7059157604.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba98aaf016d---99349019524.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/sikoxakewotutelebujuw.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/19962430283.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b76a87930---bimumovimasilobuv.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dade17e70---73413485310.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/sifomus.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/vegoxaletokametulukuxase.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e760b0f13---jozawubetonejeduzuzovufop.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/68011246733.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/87599969128.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/clk7plp4eq6gknb1635hjrp1cs/85028636463.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_off0000d77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8E 19408 bytes
SHA-256: b8e7ef565d3ce318badd5cde62646fbf4155518471a5b3590b47bc088cb5178a
font_02_sfnt_off00011f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F00 10932 bytes
SHA-256: 19288d865716162cfa9c0cd5d1f3f965b9efc0a592764d79ad0a17f59c490ec7

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