Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a800736098cf15c…

MALICIOUS

PDF

83.5 KB Created: 2021-09-17 04:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c3b600355adb5b09d54338dcfb657a08 SHA-1: 4511fc44c7ee02ce553a458091073a2c1be69579 SHA-256: 9a800736098cf15cb2a6742c71c0477a98796a6ff989d49f266b60596cf01c00
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of multiple links to WordPress upload directories and disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613546f2b6bdc---20425669881.pdf In PDF document text
    • http://grandfiltr.com/files/file/gaziwuxeravipidalo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131968c01a42---73166024357.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/1070462764.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5d7edc366---rowoxanalepex.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/e1ebf77acd38aedbc7fa74baabac4d86/dakixetikarefuzojeb.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/fajetapolujojasuweb.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/lames.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/zifejigawijami.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/gizevozowofaxominoxefiz.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/73192520674.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/wuvubed.pdfIn PDF document text
    • https://vpmemorial.net/images/file/towatojakiwekodekugib.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/dd7ca3f120d228d23fc72fa17243d5b1/53203800654.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/ripemu.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/99343458138.pdfIn PDF document text
    • http://travellerisland.com/files/tirudutugiruxerupenudimub.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/92914041544.pdfIn PDF document text
    • https://traicaygiasi.com/Images_upload/files/xinedasoseko.pdfIn PDF document text
    • http://net-work.cz/data/file/bavomegewi.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/77aa0c812966ffcab4552357ab6b7f91/xejajitopiwa.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/vozutoteb.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e069d5a63---5161795741.pdfIn PDF document text
    • http://gaestehaus-am-erlkoenig.de/img/editor/file/48844498469.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/92872545794.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=my+town+discovery+apkPDF 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_off0000defe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF715 10812 bytes
SHA-256: 652e8c3bc31be586200840b1a0c20374ff94501c8342ae906d4256cd9cda230a
font_02_sfnt_off00011049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11049 18460 bytes
SHA-256: 34df6ee745c7be7236e4e160621b247264ab0ac9db6b140a57af848fea037976

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