Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f602285630c7a07…

MALICIOUS

PDF

99.4 KB Created: 2021-06-29 07:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6a21d58472ee154cc9a0854a513d3f69 SHA-1: 093fb1b28df354adb6687c3438ca472de65e2cf3 SHA-256: 1f602285630c7a07332ed53fa73ee1521a9c2563fa6501ff024844961b6b6c33
156 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm hosted on compromised CMS uploads and disposable hosting, designed to redirect users to other sites. ClamAV and ML classifiers confirm its malicious nature, flagging it as a phishing trojan. The embedded URLs and the nature of the heuristics suggest an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://bursakaynak.com/userfiles/file/dubesopafabasabulew.pdf In PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160832090674c8---logimixevaziforufaluro.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7167d2fe18---godezaximuvosubu.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/ed0da46e581fc4b9adabe8c8d47e14ad/mabizajowozol.pdfIn PDF document text
    • http://monkeytailranchdonation.org/clients/e/e8/e82116dd0b5861b0917add2a69208af2/File/nivigotijiwaju.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/3cpsjhrb3h8stnrmmijo1bt45i/javavozazo.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/0f2043daea0f93e57528e911d93d4016/95293706721.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/2304fd92c36018bc072ea72965489e6b/89990860403.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/13899571325.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/12531672811.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/06e1nrohrpjaphkv9sdjvqfkbh/13780513805.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/vowusukuxatir.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/cbecc20d44e8d7b2061b8d37a6588f18/zogisu.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a83ed55aa---76361847393.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bugofupuforejoburenak.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4c74375dd---dedobowatafezolal.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/80451141650.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfd41b16e5---35175733506.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d293ce322---9042035457.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/96e63a3f4b8dae00ae9e5dfe72252ac1/lawekalidadinebamurolujus.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/fe1f0cb4e0d5a7671a5d2995fa5b9c04/62990622248.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/nijojesawonafixevavipav.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/luvinepagafufen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=birds+of+prey+and+the+fantabulous+full+moviePDF 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_off0001200a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001381c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1381C 17936 bytes
SHA-256: f007e43e44814ffca43d97c299470c1318b5de1ee08baadcfbd9c9542ae5626b
font_02_sfnt_off00016637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16637 11236 bytes
SHA-256: d41e70b45de92df131d0b2c36f54c71ecafad41aaded429a69ca4c4d42ec828e