Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6d34ad96447fc6…

MALICIOUS

PDF

86.1 KB Created: 2021-08-18 23:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f33ac00c73052f61b47c4fb8a45efc18 SHA-1: 777e39c50708e6714e7a6a87e5b284f2d7261b81 SHA-256: eb6d34ad96447fc6edfe1649f25bf4f174f19311a227aee2570c221be1ef0001
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms and appear to be part of a link farm. ClamAV and ML classifiers identified this PDF as malicious, specifically as a phishing or trojan variant. The presence of these link farms suggests an attempt to distribute further malicious content or phish for user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607aec4bd0b9e---puxepanabuxenogafugevukez.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829e83773c1---rosodomudo.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/gibinifowulizazo.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/jirupixelazeferanekafa.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/70240423785.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/3ef068b3ec5b96bf52cfe6819b148c3d/wofetefutin.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825432be7dd---wenige.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/7qntllqjno2cgq0o26e911g8s3/32539643852.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/sakekofemapojo.pdfIn PDF document text
    • http://world-system-packet.com/userfiles/file/16486228159.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/38228029325.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/nalemixavo.pdfIn PDF document text
    • https://adikkedua.com/contents//files/gotomaxodijitegatavuje.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/wumuwobirozamewarele.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/weragifinotoxiz.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/394ec625d0cbd4277d036ea555ece5fa/30733988027.pdfIn PDF document text
    • https://limsurdua.com/contents//files/23721244272.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160704e3763e3e---kibenotusidozanapa.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/vototimokegitedadogaxa.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d28cae5528---6136516475.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/dlg3ve85bjr6l83ophdk3rr4r5/30850029218.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a974487a894---1487790614.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078f08935afa---nuwaxuxusazewawulava.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/202152138285675.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f29cd5196c---godedevivagepizini.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=2003+jaguar+x+type+repair+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_off0000eac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC6 11068 bytes
SHA-256: 50dcebecc8a0b084ec65592aa59b51be355cc21a5f10aabb70c3ba3eef828a2c
font_01_sfnt_off0001049a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAC 17188 bytes
SHA-256: f8bd58fc9cb60330d2be611a3ec4009f4c52d029c3670e6f136e53c4d570ae01

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