Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b01f3e51a6d18f…

MALICIOUS

PDF

79.9 KB Created: 2021-09-19 05:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 01eb420b56e8850e4c8f2c36694c662a SHA-1: 5d153df8ef46e2326f618c43ada376f30fd00390 SHA-256: d8b01f3e51a6d18f18a288c8ebec802fd0c6240e980e59f616ede3ac578bf589
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to compromised websites and potentially disposable hosting. While no scripts were directly extracted, the nature of the links suggests an attempt to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6197

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 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://evergladesharvesting.com/ckfinder/userfiles/files/96581425349.pdf In PDF document text
    • http://airfa.it/userfiles/file/75568082406.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/werebukoxufozawurejeri.pdfIn PDF document text
    • http://flexa.cz/docs/file/wisog.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/fibemagefaforapikus.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/zefesuzijobokotovip.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/xeredabevarixomo.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/16318413268.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/luliwevuvufawidubejuwetiw.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/kibitagetazenuw.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/17243361858.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/47112851276.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfc078a288---16848148144.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/xiwusufakaritilonidomutu.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/faduzigobipe.pdfIn PDF document text
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/88430637256.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/78877707665.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/b6dc8ia770a6c38dgka3rjn814/fijelanogo.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/96678184554.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/84694647010.pdfIn PDF document text
    • http://kdbelektrotechniek.nl/uploads/file/30675252594.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/88407910426.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/a500ea79729c462c65f593d8d330f46d/retomezoxopov.pdfIn PDF document text
    • http://zkqzl.com/uploadfile/file///2021090410215285.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/88550662749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=omegle+video+call+online+freePDF link annotation
    • 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_off0000e1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CB 10644 bytes
SHA-256: 7c35c3c5072b460ec902014dc7bb00c3ee8573573df4ec2d4190bc5f3f5a786d
font_02_sfnt_off000111e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E3 16968 bytes
SHA-256: 5f8584c64bd86489ddb379d6dd7d5e2e3dee8c56ceecbdcebfbe8c260bd5f6cd