Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f62e9a23f972493…

MALICIOUS

PDF

83.2 KB Created: 2021-09-17 03:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 09e3eced6cf90060ed1023fc7b76eab3 SHA-1: 1fc85f8c6467412d928b52341cb14248a40ee276 SHA-256: 8f62e9a23f97249347a4599fbbdafb92f3b35801d6695470d6ba9d97c6b1dec2
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1555 Credentials from Password Stores T1056.004 Input Capture: GUI Input Capture

This PDF document is classified as malicious and exhibits characteristics of credential phishing. It employs lures related to Multi-Factor Authentication (MFA) and recovery secret requests, aiming to trick users into divulging sensitive information. The document contains numerous links, many hosted on compromised or disposable domains, which likely serve as part of the phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614197c559b67---sumusumusugeto.pdf In PDF document text
    • https://motty-etai-sharon.com/files/files/15338853385.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/pajolomumezugamemawami.pdfIn PDF document text
    • http://aptwash.com/userData/ebizro_board/file/figejul.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3412417c1---nedop.pdfIn PDF document text
    • https://self-storage.sg/images/uploadedimages/file/jitimagakuta.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/48309586486.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/dirilobegaxevitumogus.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16134ddaef357e---45435170801.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/venixege.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/7645656604.pdfIn PDF document text
    • http://vocal.bpv.su/content/files/files/tebud.pdfIn PDF document text
    • http://jngf.cn/files/file/nabakiremek.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/25153992773.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/bukonodobapil.pdfIn PDF document text
    • http://dd-eng.com/files/files/7821729953.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/zataxapatodowolobikulo.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/xifitoja.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/moronerubisawaretutivowif.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140aecbbcbcf---28662946780.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/firipiwerepakenofipo.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/91262991436.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/84867951169.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=outlook+account+password+resetPDF 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_off0000e0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C3 17296 bytes
SHA-256: 8d2ec925a66b690e4c52b45b5000a0f4f49eec2d05ef8a5af95d95ce297c5487
font_01_sfnt_off00010e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001264f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264F 10716 bytes
SHA-256: ebd2a76beecef5f81f723401c8eb2e7e6de46389687254e3b1e5e9851a2256de

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