Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b23349a8505ff8a…

MALICIOUS

PDF

87.8 KB Created: 2021-09-01 10:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cd0ba9d105ac2ab13dd9f134ec146b8e SHA-1: 5230e0efabd93bfab30594967177ea970266adc4 SHA-256: 1b23349a8505ff8ab394b3b8e85290179727276f81bdd100dd33973bbfc5119d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=best+ice+fishing+boots PDF link annotation
    • http://thangmayedex.com/webroot/img/files/19542542107.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/74234622821.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7f553c7c3---80161877381.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/xiwopikesopimi.pdfIn PDF document text
    • http://shopcode.ru/uploads/file/parifaramerazamukarisujiw.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/797278d977de7a0b2135ceb14bcc8ed4/xapuwajosibegugej.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/347218a2b67af88107e39664285ba7dd/vepefajep.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/94924915234.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/3e609d12758966f3ca2f2fbd1cd0b73e/57284105958.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/kupurimofetojinufubepolup.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609bda06866ac---vepido.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/71098074748.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/tipudoxibag.pdfIn PDF document text
    • http://mahnomenalumni.com/clients/879209/File/rasinenenumalevisadube.pdfIn PDF document text
    • http://xinyuemu.net/assets/202108/files/20210831112330464509.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7d006fdb3---melifamerufipa.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/84523283708.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/46740112686.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d427180e02---jabigasivopozis.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989bd9b75cb---tasikozarameduzepetuno.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/rugazuvivekotogifo.pdfIn PDF document text
    • https://bio86.net/fichiers/gevorofegime.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074247a7323e---perorovumekowazejiber.pdfIn PDF document text
    • https://bursac.net/userfiles/file/bimuzabemevubavagugijexeg.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/48633529946.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8221e3e56---71485835380.pdfIn PDF document text
    • 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_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 10500 bytes
SHA-256: 4adf8275b14e0cabbb8ed1fc1ae8adb6f4dbf6b47423d56de48cd10296081e3e
font_01_sfnt_off00010812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10812 18788 bytes
SHA-256: 8de188d6be5f178400376a9ae505e2f7bf59a2ee4faa92aa608ebe685d09d329
font_02_sfnt_off00013876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13876 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.