Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5e7ee1c90c9f56…

MALICIOUS

PDF

94.8 KB Created: 2021-07-03 13:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 576e938b3b5b9b0cfbb093a4aaefd52d SHA-1: 2b03f7dfda662a53840f7fcf543caf83cb5dea03 SHA-256: 4e5e7ee1c90c9f5689c9d5abf31561a115c4893f2fb5f1428e924d8262c58d43
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous links pointing to potentially compromised WordPress sites, suggesting it's part of a phishing campaign. The embedded JavaScript and the nature of the links indicate an attempt to redirect users to malicious content, likely another stage of malware delivery. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/flc5bp750rsh2l60gt51nm3vrn/ketubenajizezerixopete.pdf
    • http://barcelonasixtytwo.com/userfiles/file/33324758923.pdf
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/wonavu.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e37af35f02---48196897218.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160876ff85ceb4---13623699175.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607697798e6f4---82740032411.pdf
    • https://trungtammatnamviet.vn/upload/files/22220534292.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a75eb72167c---noxupukifibadufosa.pdf
    • http://garagehayashi.com/js/upload/files/43677391900.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607be1ed45fbd---23138857432.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/55f0ee2bf231a21b8678954c998a8a63/legitafi.pdf
    • http://saluteebenesseresas.it/userfiles/files/76146066318.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/961cd9c4fe2202bbd83ad3c825264748/vegorajefowonakavumufij.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/c56e2f33439466afa19f74a917fad109/61286661801.pdf
    • https://fultoys.com/userfiles/56019539575.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609439316c73a---jeduzexo.pdf
    • http://guides2alpes.fr/uploads/file/gosajazavovasubinifimufim.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/g2ergoq7imn8no6f3fpmphb362/61687854180.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/dc820b200657f9db390002b39d0a270c/97943631389.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8273b63e50---najotoganugujuz.pdf
    • http://arcomproltd.com/userfiles/file/57424761348.pdf
    • https://comobrew.com/newsite/images/user_uploads/file/puganupafevifufozefodag.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/tonumokew.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/296b22679c9133ca815d9bc7fba49bfb/mamata.pdf
    • http://lumieretvie.com/userfiles/file/82327687118.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=meaning+of+lucrative+job
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f28.bin
5f62fe9a502457000699b0f94309d7b79ae4cdd2de67a66b0a1e1f3a6a0f72a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F28 17660 bytes
font_01_sfnt_off00013ce8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE8 16792 bytes
font_02_sfnt_off000154ff.bin
3b86097e4d7a73565eac1fb40349241bcaefd91cf85fe620228e5dabacdbe205
pdf-font-stream PDF embedded font (sfnt) at offset 0x154FF 10772 bytes