Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7300bda61b3365…

MALICIOUS

PDF

84.5 KB Created: 2021-09-02 14:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7cc298c7c6af7dd0599673a603986f51 SHA-1: 16563856a953f06260f4a7e8a173503a7d3e1c9f SHA-256: 6a7300bda61b336589e138438f8683aabeec2b357a8286b64c4a4e22bce3938d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically indicating phishing and trojan behavior. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of JavaScript indicates potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://hanedantoptan.com/upload/files/78501399152.pdf In PDF document text
    • https://abugfreemind.com/userfiles/file/85881246909.pdfIn PDF document text
    • http://eskuvoiiranytu.hu/blog/file/gerupupigupavijabavot.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/99834495356.pdfIn PDF document text
    • http://webdulich.com/js/ckfinder/userfiles/files/lukoguna.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077552aecd1c---mudewesevikexuvewiborogo.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/1819753965.pdfIn PDF document text
    • http://lordbeaverbrook1973.com/clients/76835/File/majijovakojusidewu.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/32988245704.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ad3a1cd22---luxulitis.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160701f1f24808---subupesirupi.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/77817815827.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/cf253acbb5bc1291ede82b607f5423a3/3190375537.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/xesojutimu.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/34706226290.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba716e6e948---febizeni.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/41365022559.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/28191946731.pdfIn PDF document text
    • http://skoleniridicu-online.eu/ckfinder/userfiles/files/56849117128.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/nometasikogaxabunijufam.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27095db85a---gulobozirevipefi.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/s5c6jjjr468hd3fvbfj19c3mko/jetotovegew.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/65122107550.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/vemidiwuwenurexopidekesox.pdfIn PDF document text
    • http://tms-operation.com/upload/files/nuvotisegorosi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=gps+tracker+manualPDF 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_off0000e2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FE 18988 bytes
SHA-256: 7089310c7115fbef98fc9051d670df7c7fd26d2c6aa0d55ddb725a937da1cd74
font_01_sfnt_off00011435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11435 10552 bytes
SHA-256: fbd92e0e768e60b92f734873541df2422bf0162eb3dc66e14ab155c541e87096
font_02_sfnt_off00012c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1