Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6a63a4f93b99ab…

MALICIOUS

PDF

79.9 KB Created: 2021-09-07 09:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3dbde72356d6d8e1117fdc5e28a6d8f8 SHA-1: a279b7054cbc5f4eb8c1a618101541e4cfb2b98b SHA-256: 7e6a63a4f93b99ab6f23c0c5efbd114de01486a488d9dad652b98b32c101a989
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs, some of which point to compromised WordPress upload directories. This suggests an attempt to lure users to potentially malicious sites, possibly for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://phs1961.com/clients/2/29/29da8dc1278d8f1c58a3d16208bcb4e7/File/25137576022.pdf In PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/suxeganakaju.pdfIn PDF document text
    • http://chinalabware.net/d/files/fokadoxuguwamegiwikogim.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/doweviluwidukod.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f81e46c55---27919855954.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822a100c611---memutozubusulokidazek.pdfIn PDF document text
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/5euespg54e7ll2t1gdbpak2fat/pulawakiperejevub.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070ef603b666---56966134360.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160999b74b1ad9---90308641996.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/79436076875.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/55888719785.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/visutodekoxulemegal.pdfIn PDF document text
    • http://coinmarketsuite.com/ckfinder/userfiles/files/kubefe.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/98686373394.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/74924033172.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/6264baa07332077fe45f7edf4eb155c2/ribulibixutizavi.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/91319531718.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b78f8bc21a9---84138010732.pdfIn PDF document text
    • http://houselandia.ru/files/fevodizajunojorinopetuped.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160983b8e923a4---65662804690.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/86959411194.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/9714d5c72680512399f19b2ab7dfa3fc/pozovozexinimuminafexonor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=anunnaki+ulema+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_off0000d330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD330 10348 bytes
SHA-256: 815f4e4fe4324d9ef6bab4ef6b13b28e949e695863436e359d9732f357551f6a
font_01_sfnt_off0000ea78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA78 18224 bytes
SHA-256: bf5772dcecaaade037820346849bc15bbfc78f05b1ed14516ffa69ead1e220c5
font_02_sfnt_off000119db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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