Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f6c7526a49803f…

MALICIOUS

PDF

110.3 KB Created: 2021-06-26 00:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0ef94b8d0a5d307b63025185a812dc55 SHA-1: 2422a856134e8be538fb9dfaacf741fd316e64b2 SHA-256: 00f6c7526a49803f13c3b46f237283587a121af236102e918f29a87c7ca89e3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://astek-telem.fr/userfiles/file/menuruxilepeku.pdf In PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1af35e25f5---zexitopororagonapumixas.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/bc700c6b080ef7bc1adb190c55926348/wovegavo.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9f5d75553---32942367267.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fcab02652---84477906430.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/ladizozofuderubedinaje.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/zuwegale.pdfIn PDF document text
    • https://afayl.com/userfiles/file/28755043701.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a05ce9df12a---redepalodezeniv.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/tg6k39cn7nhrf39nadgjdl3v9k/25687625418.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160920b0c86900---nezaxozodoxolob.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/vumolalawulox.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/b3a744df2ffd0ac9f5699f87d2a221b8/gedesaxazitidogatixi.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/29790098301.pdfIn PDF document text
    • http://yjccnc.com/upload/files/dalageriravosapemimexi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/49596242ac86e2aca4658bb1c6d7f0a8/majovetog.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2afcaeb99---5435644857.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd3d0e31ee---fodinawebiletasalow.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/c63ee277893d2a9176bda29842d8e89c/navuzugimuraf.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/41472f53fa08a4a55591a5f432560ab9/vijexusajusepuwotujatete.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=biphasic+and+monophasic+defibrillatorPDF 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_off00013e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15629 24396 bytes
SHA-256: a1b18e600cc95852591b59281fc0a64b4c17f5580dc6381a229f68c67fa3cd23
font_02_sfnt_off000192ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192AB 11076 bytes
SHA-256: 3319fc5bd1f0edf2a2bf9c49b09423b53c428bba670635a2396948f9b9cc2fe8

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