Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69b34fdc1f0c0a9…

MALICIOUS

PDF

84.0 KB Created: 2021-09-16 13:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2004b54f9f8179e2c4f96bb784aa5975 SHA-1: b6ff3ea6e339fadd0a65aa23d98e00b4814ca699 SHA-256: f69b34fdc1f0c0a90b10adc98baf3bc01b8dbac310a4a7ac8cd985c7c7330587
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous external URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://infrive.ru/uplcv?utm_term=download+apk+iptv+smarters+pro PDF link annotation
    • https://jungleflightchiangmai.com/Uploads/files/xowolafopitesexobemin.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614128452e08a---90620387258.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/takafipafopojaf.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/540d8c335ec15d9152edb9288b483a4f/jiboboromajiwul.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/vopugavev.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/fubejolemipi.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/31445f21e8a355a489077a63f3e8bce9/wefemapemeru.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202109/file/fusedizixefa.pdfIn PDF document text
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/ribunonaguzugi.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/65861254667.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/jipikaki.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/sisamegosivomakowuvosuleb.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/92270495873.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/pigetumawixesuviwalaz.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/3581579381.pdfIn PDF document text
    • http://ewtch.com/upload/files/31347283631.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/453c1a0250f945798ffb5d8e184afdbc/dujowafaxunigogirati.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137cf9d6bf80---95343327403.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130054b34d9a---24940243749.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/korarimamadofobuvuvi.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/kezopolatumez.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/fujajereralo.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/bofofimiwela.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16136db0a865ea---rarezomo.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/dokexabekiwa.pdfIn PDF document text
    • 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_off0000e25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA71 10800 bytes
SHA-256: 361a38dcc8a82fe7466909f70abe77672b91babff34f597f4caacac228951754
font_02_sfnt_off00011356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11356 18068 bytes
SHA-256: f513eb9ec04845d825f1ecb91109291cbac05254085e94c08409d121eb16c6d7

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