Malicious PDF — malware analysis report

Static analysis result for SHA-256 72eef2ada39e8bb4…

MALICIOUS

PDF

84.3 KB Created: 2021-06-25 15:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 42647f51603d0e66a0d13c94fc608432 SHA-1: aa06d12154b107207de909a63c83e2152c9c0810 SHA-256: 72eef2ada39e8bb444b290c67f4f8df506476698bbbb7af9b2a5ca50eaf1d172
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm with numerous URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content or phishing for credentials. The presence of embedded URLs and the nature of the link farm suggest an attempt to disguise malicious activity as legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/bcaeda694e038c28f502c33e37e058e6/xisiwokakovobunoret.pdf In PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4126b5a0d---gilokejufudomipusurefi.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/danudotonitigesopuri.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/4692404fdb06916fa2915b45fc593e50/sugiwalitizegovow.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4274a5375d---97146015837.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/q0i7q3dpmbdkg9n5kd93odo1n8/47458858311.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/01c4de7b7c0ff02dab9a787ee68e9cbb/50242690697.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/wuzukelamaxujezup.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/23fc692ee00307099164def0c25578e5/63939939510.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/34jda7ov79hb6ovaj2f474o8i8/wokejisulinibunukak.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160898f248cc2e---fedagugagusetejujiduzed.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ce3da83c01c---xusumani.pdfIn PDF document text
    • http://valeneighbors.com/userimages/fituware.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/11679876644.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/l5h0jdv9kvjns88gio32tjmkv2/14079865572.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ktcbkaqk2f7bq8gk019lnt4203/47301971209.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/xaxovunaramojubolemomi.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5eeba07f9f---vijarozesad.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/14759857570.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=fall+guys+psp+downloadPDF 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_off0000e257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE257 19536 bytes
SHA-256: 5b8f610dfc3ebb84ba10a61f653bca6f11ca94fb0f9fc851a7ff3654da6e103e
font_01_sfnt_off000114ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AD 10424 bytes
SHA-256: ed5aa0bcb2ba73b195ff559b08ea13a8ce0d66c51699251223c632a37ed6de69
font_02_sfnt_off00012c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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