Malicious PDF — malware analysis report

Static analysis result for SHA-256 c565717b91986036…

MALICIOUS

PDF

73.7 KB Created: 2021-08-07 10:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b8e6e4fe42e8590c70e42cf7c5e2f89b SHA-1: ce4f86d2c1e8dec17d5ab5046a239756e9085823 SHA-256: c565717b919860368a669ea42afb10a70172e702aa5e43ada1949e61e539292c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS uploads. This suggests an attempt to lure users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 https://okinawa4d.com/contents//files/98580657981.pdf In PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/r5atrf04n3qqjq15pa694iq415/86059599989.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/17976147361.pdfIn PDF document text
    • http://aweibel.com/Photo/file/vafadetezoga.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b30116960d---vinoxugogeruluseriguva.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609100050a650---10907623219.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/nipobofusiniji.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/fitawotodesimi.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/48495784893.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817bb12c2dd---tofumiwevixufimijinapu.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077715e6738e---vabegazavozopubibekuni.pdfIn PDF document text
    • https://aokman-drive.com/d/files/32970088635.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/7fa4c956cb914c8996da20065698f388/bodifaleviwitatusiro.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/55142336801.pdfIn PDF document text
    • http://sequoia60.com/clients/875776/File/61128556975.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/94783155345.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/66866309153.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/272231383417.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/98751847845.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/423nshg5f1smgt3rdt1o1ov1ek/95273068027.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/8577713385.pdfIn PDF document text
    • http://delve-cr.com/uploads/jalutulinazexelez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=lovely+complex+anime+episode+1+english+dubbedPDF 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_off0000bdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD602 11296 bytes
SHA-256: 8025faa57121748bdd87dd5406d87d11abe0dc99c3aaaa71b0e214c35e80dfe7
font_02_sfnt_off0000eff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF8 15352 bytes
SHA-256: cf16a3387e9b8b78451e7fb80cd8ca8ae65231ad9cea0c7c40f808de0797a5cd

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