Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f92dd6c88063d47…

MALICIOUS

PDF

94.8 KB Created: 2021-08-15 05:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1571d37c6847234076d26e20ab4d0bcb SHA-1: d02815447d32e90066fd1f7fa8002f413aedb019 SHA-256: 2f92dd6c88063d47fcba97a424acb089b26db77083dcba2b2a17be8a86cb66df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malware or lead users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://pixomot.ru/uplcv?utm_term=ayatul+kursi+translation+in+roman+urdu PDF link annotation
    • http://renovfab-menuiserie.com/userfiles/file/bavujew.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ljen6ageumdlcl3esfp0881sl6/89436756558.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e014f7c36f---13535503909.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/687a8e990b90026ea84dd0a8582bc63b/guzejoxuvajad.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/98eb4d5ad4c36c9413732b7923002f24/27531190405.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/45831148317.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b8ce58c73578aabf134cff3eb27da54f/3102964771.pdfIn PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/pibezikenodewuxunu.pdfIn PDF document text
    • http://trekkingsapatours.com/upload/files/mowanofikuponodip.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/6adb236572775b22f9677d2cba00a857/nimuvamow.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160b74bd8ec6ac---nelezopiv.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/veroripus.pdfIn PDF document text
    • https://mimpishiosatu.com/contents//files/99718317991.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/24706899996.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/15904019054.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/86001708422.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f830feb774---16687002389.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210706073125_t6uho3.pdfIn PDF document text
    • http://brookhavenclassof1967.com/clients/0/0c/0ca802fc87877f8c548ddf85495caeb2/File/litudogikaruraf.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/62d9ced7863154ba982d0c07511014b9/xidofegagofisabugad.pdfIn PDF document text
    • https://airbays.com/userfiles/file/giluz.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608910fc2ffe1---juxofarizit.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e0ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE0FF 25144 bytes
SHA-256: 3dd63fc18318041a3ca27103d9aac97405a90949a1d5ed27b693017ab2cfc172
font_01_sfnt_off00010ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B7 10564 bytes
SHA-256: ad026624400619dc72aa9d0b0f72a52f89fcbe7089028240361a5a7f92269dc0
font_03_sfnt_off00013ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECB 17788 bytes
SHA-256: c617b29d7c172b3c510272369e7996a9b2d661bf218b198f949f1d5d2f4ad921

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