Malicious PDF — malware analysis report

Static analysis result for SHA-256 232b1adcf2aa73ab…

MALICIOUS

PDF

64.0 KB Created: 2021-06-24 15:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7627a553e3f03bdf032f2548512cd4fa SHA-1: eee58a812d186f9ef423d86500f790d9b8e3be4a SHA-256: 232b1adcf2aa73abf8d09cd1703c58df9d8a9b19de0df2d1f8a1b93876b4de42
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7866

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://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a07fb28cc---tesibebowudugip.pdf In PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/252tlabd4ktco3r04e0g4aubot/1518363802.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/41266745983.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/fasekobep.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/dabeterasixagazut.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160921f572e4fa---35980277305.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/salazapekusijomijamowod.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086967513c61---mejorewidi.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/96304915080.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/kulesejiderujej.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a148c510eb---fusebe.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/39083261196.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/jenomopobosefuf.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079296ae7da9---46576964592.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/xodobezokudavafaja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=hacks+in+dragon+cityPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD031 5204 bytes
SHA-256: e94cfbc246f682c4733cf9eb3e45321ad540805a19eb67a627a1ec14123fc204
font_01_sfnt_off0000e1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EF 3448 bytes
SHA-256: f778d828d59a0f5bfea2a9a18f5cb76b9276f0aa339f6bfa2773c7ce2a9ee8ed

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