Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eac8c2b553c01f5…

MALICIOUS

PDF

69.6 KB Created: 2021-09-27 22:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1ceab50cd7a417460591e77958547fa9 SHA-1: ffccabe98120060b0d6d87cda068a221867a3bbf SHA-256: 0eac8c2b553c01f52909d7be526de159acda5893883cb817c3ba99b3f22e5e3f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are part of a link farm designed to redirect users to potentially malicious content, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The presence of a high ML score and ClamAV detection further supports its malicious nature. The primary attack vector appears to be social engineering, directing users to external sites under the guise of 'minecraft hacks'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=minecraft+hacks+2021 PDF link annotation
    • http://rentappli.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/vugakiwisidaj.pdfIn PDF document text
    • https://pagodatalk.com/_UploadFile/Images/file/kopetunakutotijadaxus.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210922_190722.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///98991310570.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/sejivugovulaw.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/63102128162.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/9389188190.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/dazoganutugebabisiguwal.pdfIn PDF document text
    • http://www.musicboxpiano.com/contentfiles/23564579147.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/59869387146.pdfIn PDF document text
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/wowenokafuzajox.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/gumasoxijowawetuz.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/biborunisepawu.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/pewigaxuwiduge.pdfIn PDF document text
    • http://linker-apps.com/files/26358691467.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/kekonomugojijogofobe.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/puwusudowu.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/42542074640.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/84233811483.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/9018949129.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/powudol.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/dawuxutaxibebonoporawanat.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/tuwaj.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_off0000aec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC5 16676 bytes
SHA-256: 271d86d1b71216e819d5555db5eb26c94e179eeaed647436e5b190ebae941070
font_01_sfnt_off0000d902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD902 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 10644 bytes
SHA-256: c1ba308a8252998f404a8a0ed99452cb2f99dd2223a1d1d2984d84ec4e109716

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