Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca4d47fd7f46eb71…

MALICIOUS

PDF

83.8 KB Created: 2021-09-21 18:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 6649a00e440ca67fa8cf6bfe40488d13 SHA-1: 35c06c9996a0753e063dddea6e7063df5445c784 SHA-256: ca4d47fd7f46eb71ba396fe58934c0e0d2dc7f9330298438b4fefa32ede74524
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and numerous external URLs suggest a phishing or content-scraping lure. ClamAV detection and ML classification strongly indicate malicious intent, likely to distribute further malware or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=chal+mera+putt+2+full+movie+online+streaming PDF link annotation
    • http://tienhasteel.com/app/webroot/upload/files/legipozob.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146556e4e6ae---piriropak.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/zulelepitabutelegubediko.pdfIn PDF document text
    • https://adurucui.com/ckfinder/files/dazikovazedalabojused.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/laxoneruzekel.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/33102277061.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/gedogifufaxus.pdfIn PDF document text
    • http://bluebossa.pl/files/file/94840061845.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/71050043980.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/belifikaleka.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/62504591784.pdfIn PDF document text
    • http://lunaleo.pl/userfiles/file/jimatovosufetafage.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/dosinuboxed.pdfIn PDF document text
    • http://yipdeals.com/app/webroot/upload/files/visuxumawag.pdfIn PDF document text
    • https://www.l-games.jp/js/ckfinder/userfiles/files/74838948901.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/62942374274.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/mevitas.pdfIn PDF document text
    • http://hueide.com/upload/files/3539654313.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393132b8795---29751904302.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/sokutinunufomiraweto.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/89217930972.pdfIn PDF document text
    • http://fourfoods.com/images/files/28001753565.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/nigisalekubimubodiz.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_off0000e024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE024 18108 bytes
SHA-256: 00fe6c9835cbf91a83bf320ecb9ed756a4ecbc2696960673b12f183da1b0bfae
font_01_sfnt_off00010f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F21 11124 bytes
SHA-256: 9dd85c3aab613b02eff0c89b3001dc1a9412396c62a79a5972f0c7b037712c0c
font_02_sfnt_off00012904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12904 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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