Malicious PDF — malware analysis report

Static analysis result for SHA-256 47829a4e80a88e00…

MALICIOUS

PDF

77.5 KB Created: 2021-09-02 11:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 67d7425e89c3b0c58178cd874b897747 SHA-1: 0d2a8c94c39c5efc329d9887f864c287a76d147b SHA-256: 47829a4e80a88e009e212f4272d4123cb1b6760822dacaab4265db0db826ea30
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to numerous external URLs, many of which are hosted on compromised or disposable domains, suggesting an attempt to distribute further malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 7

  • 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.
  • 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://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/95062631444.pdf In PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/7121aed028ec834038f154c85ad31173/sepanuxejujipuzezaja.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/xenedelajiluvip.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9b54705d1---92109569472.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/92760968950.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210818080531.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/pubiterejutefewujeref.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/bugoluwelibiz.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/wukeluzowumofazesowanoga.pdfIn PDF document text
    • http://amandatour.ru/js/ckfinder/userfiles/files/tawabaxasinokinos.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/76783107080.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/nirofozu.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/4g7s8jj1lu7abp2uad9bistr1k/gifunivawigajawume.pdfIn PDF document text
    • https://greffedecheveux.center/upload/ckfinder/files/jiluwaxibuzedefuwik.pdfIn PDF document text
    • https://aneri12.eu/res/file/78056555090.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/83230420307.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/83332185894.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/a677fe58016f25a06bb28e73535c98d6/58238334407.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/89f6208a0b130349d16e47d20e9a5266/31608897675.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8d9715bcb---nekewoxofel.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/95126318935.pdfIn PDF document text
    • http://bio86.fr/userfiles/fichiers/watage.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/gizenomojefuwo.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/xilazosizuximolefosuf.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160983e0256876---58179411075.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=ribbons+by+laurence+yep+worksheetPDF 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_off0000cc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC56 11048 bytes
SHA-256: af5fa2b85f6072d2a07014db017955fdf1319227d45e65775d3ed78571c62af2
font_01_sfnt_off0000e5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E1 16388 bytes
SHA-256: 2c625f97bb980ef3baa7ccaa879f76bd2d0633426b45545f90a32cd778067f78
font_02_sfnt_off00011024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11024 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.