Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30c88acb63f6de7…

MALICIOUS

PDF

87.3 KB Created: 2021-06-27 13:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b096f3d5448a712dafcb5ce3fdae7f48 SHA-1: 9d8f3c4372837355dbbbe5755b7e24f83798ae4f SHA-256: d30c88acb63f6de79eb39acf2254159e84bbb2f39cc223c5ab5311aafc3e3336
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to redirect the user to malicious content, likely exploiting a PDF vulnerability for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/22003323618.pdf In PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/83ba7c764affd068022a86fbe50b8e59/84915547442.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaca001225---78448551846.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/mevakakile.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/94868323791.pdfIn PDF document text
    • http://jaatkinson.com/userimages/5767074816.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cd2b8790f---98770212594.pdfIn PDF document text
    • http://edgecs.net/documents/monafijelogedanig.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/musufevitopi.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/xudemovudixisikuzuvipa.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b58f848eccb---21275817486.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aea463cb6d1---savisatolixatupin.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735a33b8b90---11026276456.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/9d678d5a7d066d9f44f1c0ab38e252f8/ziwobupe.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/38518629960.pdfIn PDF document text
    • https://lesura.net/userfiles/file/54913616631.pdfIn PDF document text
    • https://ka-base.no/images_content/file/tafumoxuna.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/vijobasisipovizegavego.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/2b6305d9de336f878e00ba5553e00575/midujojawinovuxix.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/160746ba2aba30---vawulo.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/gasolikuxixakibekusivew.pdfIn PDF document text
    • http://decaiyun.com/upload/file/21062303530071152455m76b9c2pgj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=laravel+up+and+running+2nd+editionPDF 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_off0000efe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FD 10640 bytes
SHA-256: 95f59b18b22afb4ace2e1ddb0248b07333580794ff7665d315a52c81a12aae84
font_02_sfnt_off0001203b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203B 18928 bytes
SHA-256: 676f77a910288f81e13ea6c397704f17ecf7b5f67fabb625cba4744cc098184d

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