Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2f792332f20627…

MALICIOUS

PDF

77.6 KB Created: 2021-09-23 18:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bd55da594b3c37102d40ff6c219fa60b SHA-1: 63f9da932e6c53a90e9072576d3b3df2b9677aa3 SHA-256: 9d2f792332f206279530b990302d744ac7fb3d397b9169ed6b7fe617f4c4cea9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The document body is unreadable, but the heuristic findings strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://schule.havonix.com/ckfinder/userfiles/files/74948325513.pdf In PDF document text
    • http://tubelessons.net/cms_images/file/39414206221.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/fuxodiwogifofululiletex.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/2c8287ec8d8a6a9dfd5b7f2e4e9fafdc/87518580606.pdfIn PDF document text
    • https://www.verimevzabavu.cz/ckfinder/userfiles/files/99447379855.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/33052510020.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/pekosalajugi.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/xeduxalabelisapiguwokuxaz.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/5454664155.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/9ff41khv0sraa074k05am806sa/65724525708.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/83814905489.pdfIn PDF document text
    • http://craft-personal.de/userfiles/file/biwufutowifenotuxadina.pdfIn PDF document text
    • https://awinresource.com/uploadfile/file/finezit.pdfIn PDF document text
    • https://webkapper.nl/ckfinder/userfiles/files/wigorefijojamusi.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/towugogo.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/zeladesuperop.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/sixex.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/fewefonifim.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/subefujinaferorisoj.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/59233616383.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/jifelumexijogarejibolosug.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/49ac8c6cda497e0ff938767dd4046419/24007034557.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/12233335097.pdfIn PDF document text
    • https://nexapos.com/upload/files/jufixasufufatosefidem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=kinemaster+store+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_off0000ce8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8D 10484 bytes
SHA-256: afc4e417e5139dbec2cc1c831266ce955b209f976ce5d0097c8ce2af76e6d7e5
font_01_sfnt_off0000e667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE667 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 16504 bytes
SHA-256: 6aa4cc4302e5dc52bead83a8d54c0867fef4ee76707cd91599f8759dd4fb8573

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