Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdbcfbef2cf2adf3…

MALICIOUS

PDF

81.1 KB Created: 2021-07-26 14:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3cfa18ce3585c3ad51077d21646e88a2 SHA-1: eecf0bedfc08ee8dcb2f981a1d86dee2aaff594b SHA-256: bdbcfbef2cf2adf349bace66e4659d08adc9a324942d5a088e0bc5b2b2f0240e
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a phishing or scam campaign. The embedded URLs are designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa2be5db6---76268583047.pdf In PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160735b8932920---rirugufitakiviwavu.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/38786562980.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/31396092507.pdfIn PDF document text
    • http://broadmoor80.com/clients/866172/File/35048056915.pdfIn PDF document text
    • http://katachizu.com/img/news/files/43596027857.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/61366899505.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/25236997900.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1226766f86---wotetusitogavajegaweti.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210721_E27C6606427B2370.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087882be8891---xegogire.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/78595061568.pdfIn PDF document text
    • https://2acontractor.it/images/file/pirofesanenadiwew.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/9296863774.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607694b0cb9c4---91632267257.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/81644922516.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/ca0c3ac84f32f2f965bc6fe120d70c1e/birifimabajafa.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/005dad0c5108e5a070070c35a9b57ecf/65475783920.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/62710548014.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/wisapaniwadawuliz.pdfIn PDF document text
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/96128450478.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8de182270b---57805400802.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/93273be04h2mbv05i801qotsp3/rurexebiwituwijusorux.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a8f21d1ce---90060823983.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=2018+standard+catalog+of+world+coins+pdf+free+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD723 16808 bytes
SHA-256: 67d47ec73b0658ee708a9f6d81495e971d35cfbd19074ee5ccbafe3a8d711990
font_01_sfnt_off00010300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10300 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B17 11284 bytes
SHA-256: b8037b6f9028d98ec4d4563cd40714af467c3f0d33c5b9d753848eafbddb248b