Malicious PDF — malware analysis report

Static analysis result for SHA-256 259e8dd0de07afef…

MALICIOUS

PDF

50.4 KB Created: 2021-09-18 10:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7c5e9ee7283526d940ee4605731bafd5 SHA-1: e1654825c152bd6b40ba0ed56d9cda71f6d89b43 SHA-256: 259e8dd0de07afefcc6b44c48056bfdfbe589834d70b21b07bbcd2b304bdb5c2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The PDF structure and URL patterns are consistent with a spearphishing attachment used to lure victims to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6227

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sakura-bashi.com/uploads/files/202109061401069557.pdf In PDF document text
    • http://farmaciafasolis.eu/userfiles/files/fesodegudefapagatelomexu.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/56709824867.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c6897cb73.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/kebadakuwedepip.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/akvss0jgn0od7e0oq6k7kcuh15/nuluriniseruda.pdfIn PDF document text
    • https://ebooksweb.net/files/file/67033321180.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614117be93a83---24159490608.pdfIn PDF document text
    • http://sunway.me/uploads/file/132015562887.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/rerube.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/47340883494.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/pabudo.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/40263705478.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/65014115896.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/161449ceaa59d1---76853325294.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/19311658798.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/manajikiviwinajemabobova.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/fojoxuvamamunelakop.pdfIn PDF document text
    • http://sydjpg.com/images/upload/file/20210914_002705_156.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/8436411842.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/galibijadanip.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/mazenapakirajez.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/79886429499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=apk+one+boxPDF link annotation

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