Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e8a9e3523822bf…

MALICIOUS

PDF

81.6 KB Created: 2021-09-23 12:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d652d46f9762c616801b6b6645fd6a20 SHA-1: 075651d00151857afd22768a58643a704bd3d7e6 SHA-256: b2e8a9e3523822bfcc21319370c806664ba651bd01e53778c15085eef29da4e4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting, suggesting an attempt to obscure the final destination. The presence of a Google feedproxy URL with a 'purana mx player download' term implies a lure to trick users into clicking through to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://noospc.ru/SITE/files/editor/file/71415023650.pdf In PDF document text
    • https://hotelite.in/userfiles/file/91682862231.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/34344885695.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/68370797094.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/73682868370.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/kupemawomojokam.pdfIn PDF document text
    • https://gadesign52.com/uploads/files/202109230223286573.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/xogevegi.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2ec10f367---bujisipuwasoge.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/numijuvigewaseguzi.pdfIn PDF document text
    • http://profstil.az/userfiles/file/92910175091.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/82042599943.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/jireborinigiziliwesukamog.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210918_165022_107.pdfIn PDF document text
    • http://www.pilartangguh.com/file/96525103466.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/48816254828.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/28202196332.pdfIn PDF document text
    • https://clinicscrm.com/img/files/wejuvosuxefurigokefilejem.pdfIn PDF document text
    • https://dnsbp.com/all4help/fckuserfiles/file/rimimoxurakuniv.pdfIn PDF document text
    • https://rotitelor.com/contents/files/89128979910.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/83978447295.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/67647084106.pdfIn PDF document text
    • http://egitara.com/upfiles/files/vutekesusonusoloxupazapon.pdfIn PDF document text
    • http://tageedesign.com/ssmpt/documents/file/bivaxitiwosifose.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/xavubugarozekube.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=purana+mx+player+downloadPDF link annotation
    • 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_off0000d9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FC 17644 bytes
SHA-256: 1aad5efdf7dd5d1e08605fe52adf011087a62a6b074fa8f2e69b683c439b3f5b
font_01_sfnt_off0001084a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12061 10600 bytes
SHA-256: aefc3b769374c075a908fb0ccbad54ecc38a2b7afa00b44732c1a2c0cae0fd27

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