Malicious PDF — malware analysis report

Static analysis result for SHA-256 32672273ca61f48f…

MALICIOUS

PDF

76.2 KB Created: 2021-09-17 22:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4bca9d448e384480f2e1b0474f6ca52c SHA-1: 7f4d00d1d8466f7c30b8d9256c7f8a0a01f5d6f9 SHA-256: 32672273ca61f48f013b96538191118e775a821d235954f12bf801cfc42e1719
156 Risk Score

Malware Insights

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

The file is a PDF containing a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. Heuristics indicate it's a link farm and a phishing trojan, with ML and ClamAV flagging it as malicious. The embedded URLs are designed to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://francois-daulte.com/ckfinder/userfiles/files/98200819949.pdf
    • https://vanphongphamhienluong.com/upload/files/dafoxaresafotulugalo.pdf
    • https://ezsprinting.com/userfiles/file/rezexizu.pdf
    • https://shen-su.eu/gfx/userfiles/files/67738539969.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a74fad9fa2---jurujeraxebun.pdf
    • http://alituncer.net/userfiles/file/julamajilagufewox.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613630e00b623---61967361869.pdf
    • https://isitekmuhendislik.com/userfiles/file/pixegedapogokuvonivovu.pdf
    • http://gps-tw.com/CKEdit/upload/files/zerupejijivigapo.pdf
    • http://nationalcoopadvisors.com/userfiles/files/25669164683.pdf
    • http://sahcarpets.com/userfiles/file/lajukutuzuzufo.pdf
    • http://varosom.hu/userfiles/files/81205296749.pdf
    • https://jmcoverseaspvtltd.com/uploads/files/59717945244.pdf
    • https://worldmedglobal.com/userfiles/files/xexanuge.pdf
    • http://kwiatmetal.pl/userfiles/file/98170940920.pdf
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/41660438338.pdf
    • https://kermanrooz.com/img/files/22477212036.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161418f956f7f3---xotudujujizelanugut.pdf
    • https://petrovsky14.ru/docs/files/kuvex.pdf
    • http://congtyvima.com/images/Download/sadunalus.pdf
    • http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/32270782752.pdf
    • https://wildnaturetravel.com/File/dafuvunimunamitosupu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=surgeon+simulator+obb
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8e5.bin
4be271f3e10fde165c1790c895cd4c2d72f9fd60a7aca13a8a29b0578cba65b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E5 16204 bytes
font_01_sfnt_off0000f27f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 16792 bytes
font_02_sfnt_off00010a96.bin
a93df2477f379c3f5a56389cdb0d1fba26c33ce0025847ec27e3b3189b2e0e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A96 10768 bytes

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