Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc2ee0266635e30…

MALICIOUS

PDF

73.7 KB Created: 2021-09-05 00:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: aa039076fca86c7fc4c35039738c8881 SHA-1: 69470d39c40fa51b2b4affb8bcbd8b58226909d6 SHA-256: cdc2ee0266635e300c7b025977312dbcd256d0ecb87cf27d145875ba6abd5bdb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised websites, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links are consistent with a phishing lure, likely intended to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://archism.ru/uplcv?utm_term=evolution+of+performance+management+pdf PDF link annotation
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/ojg8tfrb95te9cftqvrm9v62q7/xudojetixa.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/6156018.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/90590089880.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb2f44a165---dugomalufisujaposa.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/97538191725.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/bbc3f851f9758b7e57c0322a697a67fa/84374851400.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/3ce9ecf9af312addbb98ab5a17105637/63294003475.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/161266e4e2abd6---tijifuwowimiv.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a63a4faff59---mujonodopexewurun.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/18663f08b8096085814d5848208a9653/89997635325.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/klb1o679c3ulkt06s19b61ca7t/43433036177.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/mulatifulitipazubesula.pdfIn PDF document text
    • http://ashioke.com/images/library/File/36995430352.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/20hqchhh2be2kgltcn9bs9r4a6/80072160996.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/xurewarepexuwup.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/d5f55f74eb92551fc776313e2c0e21eb/44860299007.pdfIn PDF document text
    • http://105chers.netsociality.com/upload/files/tepolabemafakifibaz.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/5bb6271d5e5f372951ce15686f60873b/wipikunibafu.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/bunorunugogegutafuvuso.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/70572528172.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086693f74806---wunibagevibirojina.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/ca4c9d2334c40cb4dcf32529568a940a/49434119301.pdfIn PDF document text
    • 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_off0000bf69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF69 10944 bytes
SHA-256: d2597314e9c28adebf4d5740f2f79fa787ea7ecef9f0e5d5496c18ae8eaaf793
font_01_sfnt_off0000d88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09E 15908 bytes
SHA-256: ad528b87191dcc954eb316dd8a178ed939d5fb1054db7dac4e5fd859cbecfc81

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