Malicious PDF — malware analysis report

Static analysis result for SHA-256 69efd70b03c4d0f0…

MALICIOUS

PDF

91.4 KB Created: 2021-07-27 22:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4c9c68dcc46b4c7389a3afe818467438 SHA-1: 06236759f842b7d351c5934ef48f7bb853a6b4c6 SHA-256: 69efd70b03c4d0f08d2adee8900f195f5a149e7da9dda7d97eebb7b4e58bd405
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to lead users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://tablica-nieruchomosci.pl/uploades/fckeditorfile/bimoxojugabinivelasiw.pdf In PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/depazifavutonemuko.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cff2ad24988---zoganozikarol.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e86c9b0f835---46689895413.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/eqc9ctkvtb5abgjo9u7b3kisb1/puluparoluzu.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/49567928384.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/115ba70106a64718b0fb23e27fe5f0d2/tokopokivobobejiboxomus.pdfIn PDF document text
    • http://vodnik48.ru/content/file/76149680911.pdfIn PDF document text
    • https://soechi.com/userfiles/file/degazamumiwen.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/61851132087.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/b6fc16e0060a8c1f5acc3b04d3ed9d13/badefisawutokidun.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f778c9b3ba---79403798044.pdfIn PDF document text
    • https://hostessima.pl/userfiles/file/bolaxezodujonif.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/52223400278.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/79c314c96d65f3a9f2f4e67cd10c3078/zulodotenezaxatogu.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/wujikuvidobawov.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021714245584706.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d7860a68f---lebegusul.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608570e08bfaf---xigetokitisisogemoduf.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/3gn60ri1qchhmphsr2ob4pmdfv/32219490804.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160916869434ae---befojut.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/2ca70bb29f9c8d68631f8b03875b1af2/vogavuvojelapuvum.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7a6b7eb946---denus.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/bizotumowowegofivojetexi.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/q26hrkmocle61lqut0b5op3373/12078713736.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=geometric+tolerance+symbols+chart+pdfPDF 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_off00010070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10070 11180 bytes
SHA-256: a8dd20663262eb774b2498eb05aa403dd2acfd0ce7c0fcfec004bd1ed90c75e3
font_01_sfnt_off00011a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A30 16860 bytes
SHA-256: 119f5526a3a00aa3791f02bfe1d944f5e487e142d3d75f68cb2dfbcfd4127446
font_02_sfnt_off00014674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14674 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1