Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8e2d3ceeb8ed4f…

MALICIOUS

PDF

86.9 KB Created: 2021-09-01 18:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 79f888079cb85759269bce0c69e2552e SHA-1: 0551beff5f0cc29db1cea7dc33bf25a2dc46fe7d SHA-256: bb8e2d3ceeb8ed4f25ccbb62b5cdc849b7beaa9c415c9a560595ca0b29a10ff2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to websites, many of which are hosted on compromised CMS platforms or appear to be disposable, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://aftaplan.com/works/peepsparty/html/upload_files/file/zakuz.pdf In PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0892a032b6---30354335052.pdfIn PDF document text
    • http://specimport.by/files/files/sozeferaluzafufuberaberuw.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad506bc7d7---72927200078.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/24673104749.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/rabenorameresiwaserug.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1a40bae92---nuzuv.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/ralolipekolekevit.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/37433641718.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/pukazad.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/4469842120.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d252b16071---nubonifabonud.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d40fe3b53e7---95278341308.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/67f0578c90b9c2d943fd0ad626a977fe/xozejete.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/topexetiwuzexejunuzataze.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161106d1ac1362---mikakukoxidaboratejapux.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/99031468415.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40bc516093---pejimarofik.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/67034715638.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/84137431359.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/0c12a93606c17c3b557cc57d3edccd45/gamek.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/rosolokiregi.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/woxuwebeku.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/84193429944.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/q4ls1nj5deo78rr8tm6hou3btk/91172959786.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ceac15d2a89---42889094786.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/ed2acf1a7d0ce3daade5236a306ae493/lalug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=indian+that+helped+the+pilgrimsPDF 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_off0000ec2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2C 18688 bytes
SHA-256: c4a12d2a636fff0399ebd667d155c54343fdffa6bd2521d44f108254f095deb8
font_01_sfnt_off00011ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE1 10672 bytes
SHA-256: c0aad9bff2ea941431a8f020c36ce67a835cb8721622e6c829bd8a90433fd503
font_02_sfnt_off000134da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1