Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d53aa7ef4d4802…

MALICIOUS

PDF

87.9 KB Created: 2021-08-29 19:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 219a7710a06e67f7b69e51b915ee0e28 SHA-1: 533f39bdc04be8d8235811b60c1a471740655eaf SHA-256: 96d53aa7ef4d4802002241088a8cd46398498c87f35108606ea6fa8a13e57603
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and numerous external links are consistent with a malicious PDF designed to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/d2fa9553f38daa6a13b9028eac62af2b/volubewaladutukako.pdf In PDF document text
    • http://dzirerealtors.com/uploads/ralinibeveketazi.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb73e910f44---rawisabofusedufirujupomod.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/vosupeba.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/ee1f91be18a4b0c82d20f38bba7f473a/51772768524.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/21250310231.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/48564201715.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/u5tbeo5604ori8hdvrj1pub9ep/zurovapolowotixupojita.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/qoo01ujim843pa8mt3pnh8c8c6/92044105972.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/ecdd0e0c78149624b52675155db27dc9/kebub.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/xalujefolelaje.pdfIn PDF document text
    • https://led7.ru/file/38821065866.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/4088ba48857c71fbebcc3fc02985b994/57449322062.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/92c8529f158d6fe7ebbadc04b12d75c9/rosalawaterogebim.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/51319644909.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/dasudabugufawejesedof.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/70192968712.pdfIn PDF document text
    • http://bethtikvahevents.ca/clients/2/20/20a91c0cb94b02964b0d1c5d980f1596/File/79713884881.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/88113838291.pdfIn PDF document text
    • http://freewest.at/33559259184.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/46468261153.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/70661197148.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/62706769103.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=reflection+meaning+tagalogPDF 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_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 10456 bytes
SHA-256: b542db3b37397e3d5f927796f2df021c557a56e218b56560fb0ae0a0f68bdff1
font_01_sfnt_off00010aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABA 18240 bytes
SHA-256: c0761fbdae61cb65925158bc0466d04d47f05f2f67399bc7b69501440064aac8
font_02_sfnt_off000139f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1