Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e89e14334f16eb4…

MALICIOUS

PDF

79.9 KB Created: 2021-09-20 09:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 24e2dadbf509de85700db834526252b4 SHA-1: 6f4a24500e2d5155e70b38f176ab89f23a6cf260 SHA-256: 6e89e14334f16eb4b62999da42b29e6c1b34d11092c9af1b1348e38cefce7b23
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF containing embedded JavaScript and multiple links to external resources, many hosted on compromised CMS platforms. The 'Fake CAPTCHA' heuristic indicates the document's content is designed to deceive the user into performing an action, likely to facilitate the execution of malicious code or credential harvesting. The embedded JavaScript and the nature of the URLs suggest it's a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 9

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 http://a2itsolutions.com/chop/multimedia/userfiles/file/warakuwasif.pdf In PDF document text
    • http://geombiagioschettino.eu/userfiles/files/kijasagod.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/sufafudisirogevozosiku.pdfIn PDF document text
    • http://gok-maciejowice.pl/js/ckfinder/userfiles/files/gozaxabominoser.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/ke2rkptomh34of0h6miujl7m10/mavekegajibakakon.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/ridijejifezogivoze.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/disudadalikumudogitik.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16135810de1f4f---87809635751.pdfIn PDF document text
    • http://sinojjacob.com/userfiles/file/80895078305.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/tilijowuwifatanasuxi.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/850b43d5b2db294dc93d63fda63d6bd1/80044219060.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613c45f92fedd---julozutomemomogotiv.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/tejiregovafixejagetowamu.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/gofevir.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/33977724326.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/94217884650.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614815f286e45---52623080643.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/32707827998.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/dabaj.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/21064414307.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161462cc9c6cac---girugifidi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=recovery+email+id+passwordPDF 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_off0000d1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A8 18360 bytes
SHA-256: c8fc8d57f81c1d41643b8de40b04336f328168583808044c43797b3d6d3e51be
font_01_sfnt_off00010175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10175 10784 bytes
SHA-256: 5fb04e5f21dd350d6fe87e73a62d1901297794efe04c5ba1104f1ce5fa51a8d2
font_02_sfnt_off00011a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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