Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d06446b4389883…

MALICIOUS

PDF

73.1 KB Created: 2021-09-09 09:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 60ec873295ae2e98ea8ee48b1fdfa917 SHA-1: 926d1a66c26bd6498088f207727b68d837e1d9d7 SHA-256: d0d06446b4389883641a0e93f40b28fb09677f760af9d7d23108b6fc88511353
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into downloading a password-protected archive, a common tactic to evade gateway security. The numerous embedded URLs pointing to compromised CMS upload directories further support a malicious intent, likely to host or redirect to a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/0d3c8ae6e4e7c10b9d82e96fcb4bfcee/jepivova.pdf In PDF document text
    • http://cafegreenwichvillage.com/uploads/files/11674088741.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/0a0487ba2d173f5257f3c816cec2ed4a/67019229238.pdfIn PDF document text
    • http://turchifiltri.com/userfiles/files/86703338206.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/202199511261961.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/vvdq0h6ulcjqsifv0f8nj54n4f/jisixagibarokagosoted.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/pudusenivarimatikotamiw.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/97823385855.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/sutusepusomugiluwobewo.pdfIn PDF document text
    • http://tagsu.com/attachments/fckattachments/file/lipatereboxoze.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///nizofasixezu.pdfIn PDF document text
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/7369842247.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161321a8d70009---sutajuwejez.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/xoginewalex.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210905_452DCD1D459E51C6.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/zinolosu.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/95894945524.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/11128607015.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/eaa44c13f0e5e1e92c971483c78c457a/47222404768.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/90751337045.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/44880753032.pdfIn PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/burarufarazofawomikazib.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/48292396169.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/xanirapugixanadibogipo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=hotbird+apk+tv+channelsPDF 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_off0000ba73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD285 16888 bytes
SHA-256: 289cfca7327380853afc89dd4808f43f378f8071667664f83f9f31b3c7078d63
font_02_sfnt_off0000fd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9F 10900 bytes
SHA-256: dfceaabe65672f37fecfa301d5c3c658a1721274bef93a66e3d4c7dab2cd029d

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