Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2e49b69079920f…

MALICIOUS

PDF

75.1 KB Created: 2021-09-07 13:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f6b0b8e379d5bbb1ae07efd053df5578 SHA-1: 528068a407bad87d0bfa16417b1639e8407dac14 SHA-256: cc2e49b69079920f43a11c15fa457907024ad5053535c8bf47c81c1fe2c53657
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple disposable domains and compromised CMS upload directories, suggesting an attempt to obscure the final malicious destination. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is designed to lure users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://aucoindeshalles.com/menu/file/merebakaj.pdf In PDF document text
    • http://bugskin.org/userfiles/file/93199691085.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/duno3u5651gison2q4tlg71b01/sarujag.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/cniueseo3cko1bsk9mm7mptgbs/guxuxolukubizifil.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/76522975366.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc138187d50---22066311765.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a737a960e04c52e713b4f95f9270354a/2181330578.pdfIn PDF document text
    • http://tdvvietnam.vn/webroot/img/files/modumezafupov.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/97967726428.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/donigulafizalo.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d76e4bd83---1768435030.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/29255833242.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9c36004bf---97227065190.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/84527216688.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/1953e5bd9eb3c357dcde4346ad5e4a0b/guxofonanerukerowaru.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/raboju.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/jupikalulanonepesusotup.pdfIn PDF document text
    • https://www.tvmreza.tv/ckfinder/userfiles/files/87501966900.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/2a172b58d23d4675b7d3c529be42f8df/vilewe.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/45422437307.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/66533404115.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/29807261870.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/33430389040.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/powojibolaf.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/wujorowabikovewuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=estimation+and+costing+pdfPDF 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_off0000c469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC469 10668 bytes
SHA-256: 8b4827d0448e9c5744016f5b1033ac8266a8f40515e98eac6ad3c294ff740633
font_01_sfnt_off0000dca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA2 16260 bytes
SHA-256: d28c8919692602fc2c3a4b7a45f8c8613408fd4cde5e265eba8fe32ba5a99691
font_02_sfnt_off000106b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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