Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6a9101f7fae007…

MALICIOUS

PDF

89.3 KB Created: 2021-09-02 11:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c93933f09f7982b60b2660a202c016e6 SHA-1: 81e54c0274c8d7c95e45f1e9e3488bb4b83530e6 SHA-256: 9e6a9101f7fae007e9983b30fc17d157f134d278aaae8c04bc9b596f272e0f84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or appear to be disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the heuristic firings suggest the document's primary function is to act as a link farm, directing users to potentially harmful content.

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://svetplus.com/userfiles/files/pejejamodapowax.pdf In PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/xubapifokax.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/kizumagedimev.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8416629fa---turagede.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/28306126394.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/69b802faae23da823f08f403091de2f3/sutipinifikafiwuza.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/21721914839.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b66361db0b---worukasuroj.pdfIn PDF document text
    • http://myredm.ru/uploads/file/fudabusamerukogejupesis.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/nobun.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/xinuli.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/5608c141b681ed18876695ffede7a319/12355936162.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/pulolirikuv.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ukk6re63674k00fvevua8vuqj2/25384410099.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/fb01qav7906a4hbo18ajjd2bi3/8468297196.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/e0b222310d81dd4e5494c1b30cf16f86/ropovatagusamizekikexazeg.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/477dd477e700601681cd8684fc44f5a4/mipapidipidiwebotekeveke.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/vejokevorupevades.pdfIn PDF document text
    • http://summithigh49.com/clients/3/33/3334069ac8a672cbece4a9536eb221cc/File/97076828162.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/67443813086.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8bd64e451---boriravexipuburetejibir.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/mutelutenesatarudutulaz.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16086226ebdc7d---majobazitave.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=foxit+phantompdf+with+crackPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD811 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF023 21860 bytes
SHA-256: 6431356ff82cef46d7987a64d82ae9f95863bf3f4004cce1b3419226220e2d76
font_02_sfnt_off000127a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A2 16420 bytes
SHA-256: c2875b69159c859570976b1dc9e69bd0665ec1483cd177ef3f7e954385271cb7
font_03_sfnt_off00013e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E50 10796 bytes
SHA-256: 648b1d1154e84e355c853bcfd0c98b13d2bce708fd265466b2cc4bcb50cd8fd7

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