Malicious PDF — malware analysis report

Static analysis result for SHA-256 554deb7fef18eda7…

MALICIOUS

PDF

82.7 KB Created: 2021-09-04 02:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 20f5961ff622f63113eef36cdf1922ed SHA-1: 130bf054c7d147f27eacae110bb9173d65bd06d3 SHA-256: 554deb7fef18eda76e4c0803e3a468ef32b3513db5edc967d8467cee6ab62af8
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised or disposable domains, indicative of a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://gamedunyasi.com/calisma2/files/uploads/9684654796.pdf In PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/33087996333.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079355d232af---kalaxikidono.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/ripoxurezofu.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d2c3a4fd2---lamoga.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f7699730eea---kukigoluxepojaze.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e9c323f22---94343014765.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609214d12c2a3---84499682978.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1df8dfd11---35264055157.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/baligamibimimoni.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/4de8bfe00d83916ed5a1277c4b346a08/novag.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/65392235605.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16085ae20b929a---7351062058.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/1f2d85c9fada6fb7fa6aeb2dddd12549/14942212146.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/31952388783.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/pobutapagewiwo.pdfIn PDF document text
    • http://redfordunion70.com/clients/869360/File/niwom.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/e1bfceff571cd44aa06afa0ebab6b008/86405465625.pdfIn PDF document text
    • http://chinazzjx.com/d/files/nibuxe.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d197f251060---norulutalim.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/45661870958.pdfIn PDF document text
    • http://abwbaltimore.com/uploads/files/95662253278.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/54686397122.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=jakarta+street+map+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_off0000df15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF15 10380 bytes
SHA-256: 4b019d0449c0ffc0eb009d8f6311113c1cc022315ec1af5caf87d39b2bd33d9d
font_01_sfnt_off0000f6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A5 18176 bytes
SHA-256: 9fbce0d367b33531a858bead1cf2076789238729a6e33dbdb5d3bb3d669da839
font_02_sfnt_off0001256c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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