Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5fcb40e4b44f8ec…

MALICIOUS

PDF

73.3 KB Created: 2021-09-04 19:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7305080fe7e62363329ad9134d81a791 SHA-1: 66efb751ab3ef2baf4ebdbcdbe81c7ab7e76c41e SHA-256: f5fcb40e4b44f8ec332fe774f8435b4fc30916e206e4613c37f45ecca2996969
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially untrusted hosting. The primary purpose appears to be redirecting users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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
  • 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://fogathajtohirek.hu/fckfiles/file/17418760567.pdf In PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d14f17c7e9---25441623615.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/13639583769.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/vewoneluzufenevab.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/32014235819.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/gudekiwesuwoleju.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/43697369299.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/kabigulisewotekakaduz.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087488abce19---74569254992.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb2568caac---12843321972.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/sidajoralulikorixuronolar.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e45e0f932a6bfd49958a9b3cd0cc56b8/lujuwakiwivizuralefeg.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bfcbd546a---98291165374.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/xinuradepitu.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/zajomarim.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c589760a20c---85784589588.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/86195830094.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/pusiputovovufopipufav.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de65c974e9---gojafu.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20215231757101440.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/saxatuba.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9a78e8f03---17517544609.pdfIn PDF document text
    • http://orhs76reunion.com/clients/30721/File/ditaxusubixagoru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=multiplying+rational+algebraic+expressions+worksheetsPDF 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_off0000bcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E0 11280 bytes
SHA-256: e9e937c2289b0ca1eb19b5f8f23de7a1ca7ba7d260a3251183b7bb703d497d67
font_02_sfnt_off0000ef2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2E 15544 bytes
SHA-256: 89e2f9c79576e22e25e37a3f50dd46e0323ab12225fb4d5aa8f20ed2f9f308e5

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