Malicious PDF — malware analysis report

Static analysis result for SHA-256 0292ee93d4fcaaae…

MALICIOUS

PDF

67.9 KB Created: 2021-09-28 23:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dd1abe7d211f2a29596da605dea8f149 SHA-1: f583ed4e4f28d151bc4e014265b2c3060b21df67 SHA-256: 0292ee93d4fcaaae80d36564cb719ba8985c5d01c4a3de9efe68de4ae01718cf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating link farms on potentially untrusted infrastructure. The ClamAV detection 'Pdf.Phishing.Trojan' further supports the malicious nature of this document. No scripts were extracted, but the overall structure suggests an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.1919

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 https://laborke.ru/uplcv?utm_term=fluid+navigation+gesture+pro PDF link annotation
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/rikfup9jmtnkc2u1gvnke585gf/pedizopozurupunajodo.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/33388164913.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/xodulekufimifapi.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323b06051a6---70465305643.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/35861724530.pdfIn PDF document text
    • http://investbuild.ru/var/upload/file/52889228418.pdfIn PDF document text
    • https://nycsmindia.org/ckfinder/userfiles/files/pogenedezebumisijuta.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347b54e9842---28091704934.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/januwapizugo.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/kafuvejafi.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/munirosukupiziwig.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/fulefovugus.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16142523351362---ruwakipegifalotug.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/98297001975.pdfIn PDF document text
    • https://jin-ji.com/upload/files/futaparirisobozif.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/molaluginivebipigib.pdfIn PDF document text
    • http://kbchina.de/upload/26608315537.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/goseditifunufa.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/fonazek.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/11118095088.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/juvalofukutupugugidun.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/sevugututezegevi.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210926_105120_153.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/fimilorazunuzotufoza.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210902_192712_5881.pdfIn PDF document text
    • http://losangeles.songhakbbq.com/uploads/files/degozikesidetowumewan.pdfIn 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_off0000b36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36C 16128 bytes
SHA-256: 91b7fdac9f0a95689a0f1674c24c4ff04c99762ca7951a8a8142467f5a8bd30f
font_01_sfnt_off0000dc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AA 10708 bytes
SHA-256: d0d04d512a91591b7b9fc35a54581f5afce3dd04164e3cb191c9d2ecef6d6522