Malicious PDF — malware analysis report

Static analysis result for SHA-256 629c80c81ece8f5d…

MALICIOUS

PDF

89.8 KB Created: 2021-08-20 22:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6059cc040edb9b74cd0797322837d5ba SHA-1: 342fe78dc878bbab70673e742a917013149f4fe7 SHA-256: 629c80c81ece8f5d1380ab0ae5cdf6aafa995e7a33832d954e49ac3816aef686
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to websites hosted on compromised WordPress installations or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or lead them to malicious content. The primary attack pattern involves directing users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://haniltm.kr/upfiles/editor/files/gaxowimejik.pdf In PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/sqt9uskg56k8sg9cods8bcke46/bawatumotorelomuduvuwoku.pdfIn PDF document text
    • https://cahayamimpi1.com/contents//files/31383225150.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608059df1ba6c---31417866226.pdfIn PDF document text
    • http://bjallstar.com/upload/file/39697351072.pdfIn PDF document text
    • https://ville-rouillac.fr/docs/file/dujumunodejenemaze.pdfIn PDF document text
    • http://cfacgroup.com/uploads/FCK_files/file/silupixitoruborofaduxu.pdfIn PDF document text
    • https://electroagro.es/pub/files/15914589264.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3460e309a---37786081785.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/73793447929.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/30373fa41eae9317bf5b822360c506f6/4638286073.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de082311e6---wakozazigulunima.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/letezonuxixivexonimale.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a061e56518---sapuvosotoruvevipopowek.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/ganetupisojumazenofasazid.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc322648743---donatarajipitilex.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/duvidamasosivo.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/e42f917bce16990d6b8868f00939707b/32949498637.pdfIn PDF document text
    • http://vhs1970.com/clients/873287/File/33428539329.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/19392739970.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/fonebivavukimuzufulipegup.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/b6b8e7f9bb77a06a5490c7ca9ddb0dcd/90824618973.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/64010400811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=amharic+to+english+translation+software+free+downloadPDF 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_off0000f94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 10988 bytes
SHA-256: be9ed95a20a55cf02c2f5518dcd4c95a7e90bb2cfba98ac57b0101b5a859999b
font_01_sfnt_off0001127a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127A 17772 bytes
SHA-256: c3b0e38db4bad836ef64730d4689f626ceabec71e5fbf87e813406a7910feeab
font_02_sfnt_off000140c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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