Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15ce79f396bc954…

MALICIOUS

PDF

84.1 KB Created: 2021-07-15 21:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 540e777a48f018fa16132af59b167b32 SHA-1: 88984343baf08dfc4749951b5c88f8d8f3ecc76b SHA-256: a15ce79f396bc95448d5f02fc403e13e3dc75d48a51f3446f6355ac1b17c3b3f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress sites and algorithmically generated URLs, indicating a phishing or malicious redirection scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The embedded content appears to be malformed or obfuscated, preventing detailed analysis of any potential scripts.

Machine Learning

  • Nyx PDF Classifier clean score 0.2479

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://ketchas.ru/uplcv?utm_term=ssis+excel+destination+data+types PDF link annotation
    • http://bhs1966maui.com/clients/64750/File/gefosodofefoworuraxumef.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/54412739182.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a15ac61ce21---wafijodigewekeniv.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/6fu6919nahdv8vmho6slltpdu1/rorizugizetaji.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/b86563eb12037ff8cedc8395dd0bcc93/misazarotive.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c77e9e5be0---78787386524.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/sutadopi.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/egca42vrg8okfvjk0ibfs19i60/pivevipusuni.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160762241bb844---69337061668.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/vilolizulatopetefaw.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/91b30fa661c37878792f6e787726550b/28868452334.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a04c69fd2c---40700823623.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/xekesulatakodezimadarijo.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/bb26ef2e0eea1ffc79ebc40ba1e3a0cb/53934717544.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/20372991707.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/44346954133.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac21747ef0---89222192861.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a58453ea0b96a6c2e68a9735aa95844e/53495187204.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160713e3028b62---72195955460.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/96683149792.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/bec6r7dno82c2vlb7ets7tnq2u/18447420304.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed724a93ef---28353846019.pdfIn PDF document text
    • https://groupunsur4.com/contents//files/fizikokajapisore.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/792a62631ff794d814d93d9f66a8af32/mezide.pdfIn PDF document text
    • http://elma1.ru/!upload/files/64867945505.pdfIn PDF document text
    • http://asustainable.com/global/file/39565470282.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/fc2071a289dca8a97792e0b5f9f0de81/61932606876.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9F 17488 bytes
SHA-256: 8b6defec186746f758948ecaa43c948a669641f2d45907b8af725571907b990e
font_01_sfnt_off0001288a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1288A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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