Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5e4655af38868b…

MALICIOUS

PDF

96.8 KB Created: 2021-08-06 15:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5458a0b1b594e9afb3d2d39dd169ad10 SHA-1: 07f8bf64ed15d6f2f17264f7c748c357803abd00 SHA-256: ce5e4655af38868b4baba9c0b21b7cdbf8f954906b0fea4eb910bc382bbac678
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely to distribute phishing content or further malware. The presence of multiple external URIs and link farm heuristics strongly suggests a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://smidgel.ru/uplcv?utm_term=imagenes+de+goku+para+dibujar+faciles+a+lapiz PDF link annotation
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/h3h2gsi6nke4lbr93dqr6p2bcu/rikukuwiwobolusivo.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/c652ac96ec055698cc8e725c2bdaca18/mulojuzes.pdfIn PDF document text
    • https://daks-96.com/f/uploads/files/49325645060.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/ve2mu17n4pmuomn9rvlq32fkk2/83596363739.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/48852417021.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a600adc5b4a---95750939023.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/685414510.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/207vhm8vgatvmigi2d3v3p3i96/javegidorewudajutes.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/53515403460.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/46602143392.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607668648aff4---16320061204.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/gojopafedisiparan.pdfIn PDF document text
    • http://aven.su/userfiles/file/liwukilesowareguduvulir.pdfIn PDF document text
    • http://realestatemiami.com/userfiles/files/sapovetasirelalebedum.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b71194e5ae1---80698305885.pdfIn PDF document text
    • http://accronline.com/userfiles/file/judeperiluxedo.pdfIn PDF document text
    • https://miraclechuppahs.com/userfiles/file/77547876534.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/d7f4d7c6ab9e9b7398ed704dffb5b93d/kejamavazif.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a758593f539---61959232444.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/gajizepugekerupodepiro.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/zumupeluselajakebobewuren.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/q08djjvfkj721sve9bmg6plfcc/91286014997.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/92320637443.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e0a94571dc9---18399926917.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/mafidupaf.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd02ef4121a---lidovebofigulopasav.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0A 11340 bytes
SHA-256: a8f43bd7a27d5354fa668fdd9442735ef22fcdb95c180fa54913e6386ecdb2f7
font_02_sfnt_off00012738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12738 17724 bytes
SHA-256: 45b2a9a9761124be508f76fc07f9c855eaee7bab828e22e3a74ca2b344580e72
font_03_sfnt_off00014221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14221 18656 bytes
SHA-256: a18fdfb53357043a6afabba06416319bf425e9c822cae77b78130227656f2253

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