Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6fe0c32c2f6a535…

MALICIOUS

PDF

99.8 KB Created: 2021-09-06 20:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8bea3a996662be6eac6d2917c8fdd546 SHA-1: 1a536506ad2558c3c0df7c3db810c72aee90b5d0 SHA-256: a6fe0c32c2f6a535c799bd8ef21dcdfa89bbf2c58bfd220a8f4ff14d07d6e1af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to potentially compromised WordPress upload storage, suggesting it's used to host or distribute further malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2f663a2d5---73543603333.pdf In PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/tv842bni874cs1q5puk9t997p2/83569451363.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/25406415820.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/sunitadam.pdfIn PDF document text
    • https://ambalatender.com/upload/files/ladukikaguwob.pdfIn PDF document text
    • http://ozgu-yapi.com/firma/files/55405769577.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c473f22124b---16259468705.pdfIn PDF document text
    • https://coevent.ru/upload/files/jasexu.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/4b3206d2bedf6482c806433b1394a169/22846510658.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/roveroxef.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/10240012385.pdfIn PDF document text
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/norul.pdfIn PDF document text
    • http://wsm.hk/images/files/71714077150.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/47812823307.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/33825921786.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1e725f23e---votawatesofisuporelamon.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/9cc10c78000c5df8f01e7e36fe1122d3/93252493917.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/92197290522.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/22813266133.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/17088352943.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e9627cff---85085139109.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/kivaferapumudajitiganes.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/95543169611.pdfIn PDF document text
    • http://modulobase.com/userfiles/file/tigelatopibe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=documentos+del+magisterio+de+la+iglesia+catolica+pdfPDF link annotation
    • 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_off00012010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12010 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13827 11064 bytes
SHA-256: a9000aedb3fa03be76e6a9679073f010c0bb17755367d430879b70cbf25a953c
font_02_sfnt_off000151ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151AC 21116 bytes
SHA-256: 87f5a4052d322f5207444b98f77e96e973c203dc87f23dd9b89212d7717d25e5