Malicious PDF — malware analysis report

Static analysis result for SHA-256 14dc9536dfb7c518…

MALICIOUS

PDF

76.4 KB Created: 2021-10-01 17:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b104a109e778ef6f8c8109287f881d37 SHA-1: e3fc38013dbcbb70a19096d952f9dcc8c1f9fa1e SHA-256: 14dc9536dfb7c5185078d2112c3ba02aa6778b67a92794e18407aa53684b9a66
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and embedded links, typical of social engineering tactics. The ML classifier and ClamAV detection strongly indicate malicious intent. The document contains numerous URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9757

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 76 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://fongyoskert.hu/userfiles/files/julavibonemedemosibu.pdf In PDF document text
    • http://nanumed.ro/uploads/files/60469678900.pdfIn PDF document text
    • https://pecsikult.hu/files/file/nozarozugoviluperukisoza.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/naloda.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/zijawujuratejevodaf.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156b0ee2043d---lusirokunevetupimeju.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/f1vqn1d1hcq27h965pjv440qn5/5506293100.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/8jsluon8ef544jtgq92rou4gol/wotatexezerogaj.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/6474238898.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/kalitakijubarova.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/vabikesagewopeko.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/miwepufutidukawol.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/77177690073.pdfIn PDF document text
    • http://newo.ru/files/files/89932349532.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/29631095522.pdfIn PDF document text
    • https://usgcambodia.com/userfiles/file/47237413337.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/34401906333.pdfIn PDF document text
    • https://minhgianggroup.vn/upload/files/45485765248.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/tatilebuluwoxonefuxadeb.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/tasegipofedabasexiligu.pdfIn PDF document text
    • http://eko-gospodarstwo.eu/files/file/jabinowonadafoser.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/64320219490.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/rijirurew.pdfIn PDF document text
    • https://war-old.its.vn/new/userfiles/file/xoxusevi.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/rexodifupos.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/gerixonuralisosonuvuxozar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=all+web+series+pc+mkv+mo4PDF 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_off0000b200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB200 10612 bytes
SHA-256: bd31eae3623d7707dbacdc3b8a4e63e961be78d14f5f640b01ef4f76121c1d8e
font_01_sfnt_off0000ca28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23A 14112 bytes
SHA-256: 3a8e8510286f5f8f793f175fb05b854d9260ff8f5f6450e512b94700bfc5e8c1
font_03_sfnt_off00010539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10539 18256 bytes
SHA-256: a353691a97c182d3ed1270f097d03d79ae2a1ce49a520ce6b58d16cf6e9026da

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