Malicious PDF — malware analysis report

Static analysis result for SHA-256 5767d5048945bcc6…

MALICIOUS

PDF

70.3 KB Created: 2021-07-07 16:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 865b7ab38d9ff37a7a9e0a39290f34c4 SHA-1: 8975e00d0ac8da63e487005edb184ab619b4e51c SHA-256: 5767d5048945bcc6b29ad5ca5f6b5c8b5dd742d437c32aadcf62f41d5111601b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. The presence of numerous links on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607909849fccb---sevudasisajamupo.pdf In PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085f71246846---kowal.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff22e50f7f---2824676040.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/1882254660.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/zazopezawi.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d611e3677ee---51311963640.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/16002113448.pdfIn PDF document text
    • https://hagepoorter.be/files/files/xolejowatafobufesoja.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/fafobamekufug.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a4386ad5172---jesakedinajimiziwe.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/97cb74ceaa35fd780becb4ce83435881/33064754796.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/86232402888.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/4d5f4a00caffbc93e140baeab0d1c2eb/rodonasusadagibimo.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/380bd9640690d8d4793ce61f40eb284e/tunanigemikeka.pdfIn PDF document text
    • http://wenxuezj.com/images/File/95234212382.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/870b6ab1f85bcc0a311ff92fcb0dae3c/wugafoluruf.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/d37574db181ae6e389e95278d147a2d7/nefatuduta.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/zeparobilezil.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/58081272920.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160944378b1a3a---86222231806.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/14f4bcf115425cfda120a4f013147e0d/nazezar.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/fapilidebotaxilak.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b225d7892db---83211935211.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/fovilogegu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=what+dragon+are+you+wings+of+fire+quizPDF 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_off0000b29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB29E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB0 15724 bytes
SHA-256: c7e0d2c7e1ceebfdc662b939a1a41d59a37a8ff3d6dd0bcc695a226e35b8a6d4
font_02_sfnt_off0000f270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF270 11088 bytes
SHA-256: 97f66028c9e5efa04fab431938e15340a1684d8dfce1c7c96832e90b53cee7a1