Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6299dbed54074e…

MALICIOUS

PDF

84.0 KB Created: 2021-09-02 19:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ba3feb62d0d4e7d4d934102e046d48ca SHA-1: 5b613cf16e705784a84c7f2db00c7b28d9a94385 SHA-256: 7c6299dbed54074ecfad4fa8ee0ff0c37d854f72c66f3b98c812547ff997d983
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://wastran.ru/uplcv?utm_term=motorized+drift+trike+plans+pdf PDF link annotation
    • https://guanlai.tw/uploads/files/202108161308021085.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/95802282061.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/benogikiwelopamal.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/mokorusadi.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/57354904480.pdfIn PDF document text
    • https://suacuasathcm.com/uploads/files/kifasamuse.pdfIn PDF document text
    • http://songiadabinhphuoc.com/upload/ck/files/48565488387.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/10497054344.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/jcrfm2l76ob24b3ngjhoje3d63/rubesezefobumufap.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/4f9b7dcbb185769712bb56b0999ee201/63157179852.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c105917c082---guvanewatovubesu.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720499cbeb0---36798771739.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/82095993636.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/uervjgllpp9bd5ctrith4kjqjv/83074243617.pdfIn PDF document text
    • http://888spirits.com/userfiles/file/mubagusepawebusevukanuxo.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/0543b7e08b00cf6f253f1f6647a54133/jumuk.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be6eacb2701---dakiniwuzozutazise.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/5e3k9hcq3c9q4oncibhsp7hliu/88910991140.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/livenovupozenepej.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/abc056a2f5b79909c6ee4fd893683471/29333380165.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/pekebuperitunexalifufum.pdfIn PDF document text
    • http://woorymart.com/userData/board/file/73105183836.pdfIn PDF document text
    • http://houselandia.ru/files/nibidajufeziberebebi.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f09556cccd3---lufotilasi.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/27117b363a48b9e7d69952110dbf71ca/76355707798.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/54262103436.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_off0000e0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C0 18732 bytes
SHA-256: 9f4565948e459639fbe1258c6dd6b706f453b85a5ae445bdd90154b5eccf7caf
font_01_sfnt_off00011196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11196 10636 bytes
SHA-256: afe1be9c82ba76e2808cc016392647514dd56ac9c8cc4658e6e6408154a0b80b
font_02_sfnt_off00012a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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