Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f0b0b1ac56f78e…

MALICIOUS

PDF

82.4 KB Created: 2021-09-03 05:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 121c00e077900c6e59d55683fab9bd2e SHA-1: a6e5983b5b3d41cf21d47ed1c32861db381e69de SHA-256: e4f0b0b1ac56f78eb4ddd9d56275ea0e8aa3692732f4ab6ce7dc1e12376b8a13
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious content. The primary attack pattern observed is the use of malicious links to lure victims, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://irlanc.ru/uplcv?utm_term=istikhara+ki+dua+in+english+pdf PDF link annotation
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/c3f50ceba99484b6bf50424558344703/foxedazi.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609455571b960---15790081508.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/vojofurojitetobijepete.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/c4b400a1817302cf77b21f93cc3c7360/18961230292.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/fapedi.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/ce7109fd62b89313eef4bc8bd36ef70f/puvabowepa.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/katobe.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/zivawegoxepoz.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ca8ab937ed6c9137434573bdf5ca7432/moxulukezajet.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c4cb8aa91---zitexewosifa.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/73724379525.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/tevojosu.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/1743459107.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/5vre9l0uhh3sg0dirkgnk7p28e/62163882030.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/xaluwizonot.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/25309464650.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe3acf0a18---julapokudowodavopedirenem.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/r34fs6c7pft8diu9973l4vk9ui/ropupubi.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160733bf525743---59930172190.pdfIn PDF document text
    • https://ekransamara.ru/files/dafosamolavutid.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/rumuvidexuvarixubexukore.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/komaxovewimuv.pdfIn PDF document text
    • http://raczcsalad.hu/files/36292902217.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6147d1f1d---36204791321.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_off0000d2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 10800 bytes
SHA-256: 13384441e3119bf51b5fb3efb477fcd3ea79b0db9452e0afe7b7eafe7507cc5e
font_02_sfnt_off00010373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 21528 bytes
SHA-256: 7f24f8fde9aab05f157986e3892d66e3e1504fde45eb52b022b912bd70413aaf

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