Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b964b982088ba7a…

MALICIOUS

PDF

85.0 KB Created: 2021-07-04 15:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e19124161678b72a2f38e88da04dffe3 SHA-1: 2e4c1f74d4fc10772f6b59cf2419d83bb38ffe71 SHA-256: 0b964b982088ba7ab430a1511cf6bcb989bbb6218798b665c4a8e6e782537e22
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external URLs, many hosted on domains associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing sites or download further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/53913393356.pdf In PDF document text
    • http://bluedevils59.com/clients/862365/File/ropidomunenimusel.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/jebaw.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/23602604394.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085cda73502a---57215559158.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/e16c75d9f27b3f10c7a43f5ad867dae5/16971976274.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/paxotomuramezajivigepife.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160749980304c8---78377425850.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/vabarilix.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ff7d9f29---26511356874.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/63005803009.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5c07020da---vidofudekezume.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/nodogikuzepasepisowefot.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85d57cbab8---14174113008.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/lemarebum.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/ob5i2ltkgevnlprndcqb0e8g36/jisujimak.pdfIn PDF document text
    • http://normel.org/files/upload/file/42647640645.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/5cbcauubfr0b8qjqi0q8afac02/79123766119.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160af9ddfcdacf---87697143645.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/jatafebuzifigivifoli.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/babe1ce0353901d9102bc7365959b361/64582363436.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/xozewe.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/5f97218bb628566d7b6a6faddb6ee8b1/falupopagakebasasinizafa.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/fekirewubavubi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=javascript+array+fromPDF 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_off0000e999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE999 17568 bytes
SHA-256: d0fff4b9924a82b93feff01113ad8e0d5538a28a72f3431552d99a1a8b4af4cc
font_01_sfnt_off000116f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F7 10528 bytes
SHA-256: 923152ef905b60ccb7dbfe9123cec82faeec3bf29237a04fc864b3f7ddeef4ae
font_02_sfnt_off00012f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1