Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e399b90628a8fa…

MALICIOUS

PDF

88.9 KB Created: 2021-06-27 23:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 166e34a6f40bbf458b87b7dcc528c9e4 SHA-1: c1a972f294ab0e4dc950f28cfa0e608fee4ef8b3 SHA-256: 97e399b90628a8fa5cf98003e53e9d0c01a9d71385a71075ec8f0177eace6d4e
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. The numerous embedded URLs point to compromised websites, suggesting a phishing or malware distribution scheme. The file's structure and the presence of external links are consistent with a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://philabc.ru/uplcv?utm_term=cooling+tower+evaporation+rate+calculation
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/p51bmf3obl6kn71j9mj4n1laf2/55976796813.pdf
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/tagagiguvab.pdf
    • http://hopkinshigh1966.com/clients/1/10/1054c114374c88b4a165e91103565d41/File/tuxenajukevixo.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/r1bhqfv5dd0hv93bcas0bv0qg5/99820022755.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/trkji8dibb76fjuq2bjedonkor/mupomupogalijidir.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc65c1f786---kuworozovosututabe.pdf
    • http://circuitoinsulargc.com/documentos/file/90224258245.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/enmn2prkmjqp0nob32n9lskjaa/88984828628.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af768c77c96---lenagadi.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/iocdpc0e5s8d8tujbeksn8jje0/patajuguferep.pdf
    • http://brooklynsmokeshops.com/admin/images/file/diwekenujomoj.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/6307fa369345cafa89fa9ea29b7ce587/67102085393.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082d09e45e64---nufevew.pdf
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/vodesiz.pdf
    • http://timandlor.com/userfiles/file/24836616367.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cf82059816b---vagomovopodorijitu.pdf
    • https://autoparkalbanese.it/file/89782145866.pdf
    • http://interno-kazan.ru/upload/files/rujirakizovefefige.pdf
    • https://nsck-cykelmotion.dk/userfiles/file/letamagoduk.pdf
    • http://gramercy-grand.ru/files/file/sivujiw.pdf
    • http://toyotarent.kr/FileData/ckfinder/files/20210621_849C9937F476A5C6.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ac2cea01061---vemewosatebunawug.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc31ba65e4---kukukekusunegar.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091687c2308a---nefefuretoj.pdf
    • https://travelsafeway.com/userfiles/file/novogokidojoxidur.pdf
    • 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_off0000f7c2.bin
8887bd1b57f313642b02604621fdd94b0e8028753be3b9aeb21c4b393e627076		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C2 10664 bytes
font_01_sfnt_off0001106d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1106D 16792 bytes
font_02_sfnt_off0001287f.bin
17733da1c7e5e441a364c391087904d47d4f26a4d045d978b3babbb189cf0861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1287F 17296 bytes

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