Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea58cc3d65a441a4…

MALICIOUS

PDF

104.1 KB Created: 2021-07-27 14:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c942ab4a0dc8672f00b3e7915b5d099d SHA-1: 6a2227fe0e84b56f5dabb3cc510ab7e9137c8639 SHA-256: ea58cc3d65a441a47bcf1d80910eb308a447880ce5df7e70c7302d52d8fb413b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of a 'Password-protected archive handoff' heuristic indicates a common tactic to bypass security scanners. ClamAV also detected this file as Pdf.Phishing.Trojan.

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://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/c20764b30fb1c2090e737c7a0657813c/92546015042.pdf In PDF document text
    • http://www.amedna.com/userfiles/files/88335261960.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/63498931477.pdfIn PDF document text
    • http://ibb-online.ru/f/file/rujopojib.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7043b088d---zelulonotenusasim.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e7cd40008---vizafaxezi.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/3946733245.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/12692099227.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee7ac2f359---zirexisetatiludud.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/36736668635.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/c808437260d46456c44fd94ce20b2f62/71700259092.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863d0dc513d---zemasesezobatejeweg.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/32340494361.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/kekefu.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202107040714416603.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/4j0a0bsi3q5c8cj68knmikc7g0/pezososu.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/zuxarunoja.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/xupugidovomokaxapix.pdfIn PDF document text
    • https://airshow-bg.com/file/22984765497.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/5fffccdab1fa27e9287c53f9da3f7f23/rutafapijidavudopivar.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c8d7e5498---78393080285.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/61241514674.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=dragon+ball+z+shin+budokai+5+ppsspp+download+highly+compressedPDF 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_off00012da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA0 17768 bytes
SHA-256: 6c520526ffc95641de73aa5d48e794fb8efa48778567d30fcc87ae9201063125
font_01_sfnt_off00015c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17428 11592 bytes
SHA-256: b47de6cf881ed8b0af18ea3f95647ed981e1f551f28a02382b9a0cc2c3510f93