Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d622430b6a0dca6…

MALICIOUS

PDF

80.9 KB Created: 2021-09-11 11:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 314974a31c7d0bef673174a1e82699f4 SHA-1: 2b45a8800169931a0eca40cda44e8cc9a611269a SHA-256: 7d622430b6a0dca6c19296f61f5ef986cde191639d4fff1e09057d7525fa9874
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or are part of a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/gamomudobaxadelefafimovux.pdf In PDF document text
    • http://umhouses.com/uploads/files/87056458288.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/mabitekegizin.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/43766698855.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/xumitarotaruvopa.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/41593428631.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/luxegotilujedawediwiri.pdfIn PDF document text
    • https://tefen67.com/userfiles/files/momasipoposigadupo.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/43327488229.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9d85f2434---17538918040.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/1088732021.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/xufopuxuf.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/lerikoxineruzovomoso.pdfIn PDF document text
    • https://bloc-immo.com/images/juzupivudujolapale.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/nosurapavudamuvidifofudeb.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/pamanufadezigowate.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/dodozigenabev.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/kujcpr14lf5vf0adfbmesvc4b6/movat.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/demikelufamovibawekemufov.pdfIn PDF document text
    • https://academiapreprod.riportico.com/userfiles/files/47882589453.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/873fd1ab9cbad8152f53fa2e5a8a27cf/51251350377.pdfIn PDF document text
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/66797405648.pdfIn PDF document text
    • http://lawyersmarketingusa.com/user_upload_image/file/In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=world+clock+androidPDF 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_off0000db28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB28 17064 bytes
SHA-256: 4f1f9fa1a9cb789de7a1c0ec30d5f8efc263b1c2808cea7ff35d142bf2d5b4f0
font_01_sfnt_off000107ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC2 10052 bytes
SHA-256: 531bb27c7f031f71265a9624b87c7db04f380b807be4d586cffdf2f9eb7792ef