Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abebc22a3c3f386…

MALICIOUS

PDF

70.2 KB Created: 2021-08-28 22:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6fddc93871b504737e981c00a733a935 SHA-1: c61e4555c12492176e20fce1ff3d77c49f680e44 SHA-256: 9abebc22a3c3f3868a832f5e92512af9f247a9c9835137e1a5f39fce9147769e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, utilizing a link farm hosted on compromised WordPress sites to direct users to potentially malicious content. The presence of multiple external URIs and the 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggest an attempt to trick users into downloading an encrypted archive, likely containing a secondary payload. The ClamAV detection further reinforces the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://pixomot.ru/uplcv?utm_term=orbot+android+download PDF link annotation
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc54ecee2b6---66184263019.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/romimosagulenemisobe.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/muzumur.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/8eeb5fd79f9064fed4f1f31bbff098f9/5220950706.pdfIn PDF document text
    • http://albertaracecar.ca/clients/49797/File/dezurike.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d48126944---97965544109.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/60123498828.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/95070079707.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/bijureburirape.pdfIn PDF document text
    • http://esistore.lu/userfiles/file/wutetilubikezexamezibamaf.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/pinokeju.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b493f3309---kemenasefubalixuzi.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/68398438955.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/38800746376.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/1e83431001c3481ee4dc333e9e668e26/68889175745.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16109f9b855424---luremitulusegelepowanuwu.pdfIn PDF document text
    • http://huefpdf.org/upload/file/lomawugivaxanenemafure.pdfIn PDF document text
    • http://akcompany.vn/uploads/userfiles/file/28794905788.pdfIn PDF document text
    • http://promador.pl/userfiles/file/55938782960.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/98096802570.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160de40136c791---26016029053.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/ruseru.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a9b3b3dd7---26938286567.pdfIn PDF document text
    • 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_off0000b81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB81C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD033 10192 bytes
SHA-256: 6c8a55007012d1710a6bca3b5a2bab24fb88bbe8ad3a0d73a39b79540ff3bbd8
font_02_sfnt_off0000e725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 14416 bytes
SHA-256: c88eab270bb5d3966a6805ea205224fc7ca4fd2992a50bc97a38e7a3500691cb

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