Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd16d10c53d4f2e2…

MALICIOUS

PDF

64.0 KB Created: 2021-09-17 00:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 9409209e787c69cbd32a6e671345d5fd SHA-1: 577c3608b284ed6cec57a88d9e9f9fc4c812d45c SHA-256: bd16d10c53d4f2e2c98fd2e5d9e7e6032f089bdbb1ea138cf713e183ad9d4792
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to external websites, many of which are hosted on compromised or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to act as a link farm, potentially to evade detection or for SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7082

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.
  • 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
  • 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=disc+dj+3d+mod+apk PDF link annotation
    • https://ville-saintleonard.fr/pdf/tenitujunofali.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/47227315904.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/jejowojesusaxadewotunamud.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/34919154623.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/34377051226.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/83843448431.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/jitorisadeximibisatagom.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/debobar.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/junotila.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210916212936.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/lovugufeveba.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/sibexaso.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/zoniki.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/c96c602da4c751200c0e5bbb039c4add/79023618671.pdfIn PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/nulowe.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/b684667ba26190b330a606386271bd2d/pomonu.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136439b43a31---48717077980.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/65513995576.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/sopagefaremod.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411828b07f3---16322684556.pdfIn PDF document text
    • http://erpos.sk/data/files/27298840532.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/baradet.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/brmilshkpbppakccmv9taqn0j1/sewazomifedobod.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/nafar.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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