Malicious PDF — malware analysis report

Static analysis result for SHA-256 d865274ccf90bb50…

MALICIOUS

PDF

68.0 KB Created: 2021-09-19 17:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 52cc4e0e9d0fd9f645befd71b72e73c6 SHA-1: a66681278cf2880e09662b2d4819d26ba6d76ef0 SHA-256: d865274ccf90bb504c04d536dc0039595b5cd2d7a50d09c06cf027bf9001097a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or exploits vulnerabilities, contributing to the phishing and potential malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=relaxing+io+games PDF link annotation
    • https://wspaperbag.com/userfiles/file/towelijubinuwem.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/13402026896.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/74090253286.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/70457bc93c95b543914f84efd4d2be9b/22524297540.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/fekoxitavebutajujomok.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/d7719256b94d609c9795035c5ee59261/5124786494.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/28772517472.pdfIn PDF document text
    • http://kingsfci.com/userfiles/file/24051057039.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/sonejejapumekute.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/nerirurivipi.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/xulukawifupedabazatax.pdfIn PDF document text
    • http://uhorder.com/upload/files/70765586090.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/mutax.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/77159075754.pdfIn PDF document text
    • http://sun-eko.eu/files/file/xawap.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66705481495.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/387a5582d411e7433ecd5cbf99fa2a19/wizoxux.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161335d9147b56---22835508119.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/45969504049.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1614061491d2d1---bupuxolov.pdfIn PDF document text
    • http://gordostcrista.ru/userfiles/file/zidiwixaroropomidomeli.pdfIn PDF document text
    • https://mediacentre.heathrow.com/js/ckfinder/userfiles/files/10506768671.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_off0000ae21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE21 10400 bytes
SHA-256: 48c9566d413deda25f053aa4366d0a56b4f7605de39969a68fc185ed8bda9416
font_01_sfnt_off0000c5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A3 14936 bytes
SHA-256: 01deadfe67e0be4706a25265aac2678e72c038c3b493a706152678cdfeb1e5a5
font_02_sfnt_off0000eb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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