Malicious PDF — malware analysis report

Static analysis result for SHA-256 8746f93f1dad56ac…

MALICIOUS

PDF

78.7 KB Created: 2021-09-15 21:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7585e6dbbe83bea4de7b73dc75df2de2 SHA-1: f45b694574742c8c64d0f1087ddb3b6d5574a263 SHA-256: 8746f93f1dad56acc2a6d746cdbca5705b5aae560588b5ca71d6ca1e0a0f9bbf
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely exploits a vulnerability for client execution. The file contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download button' lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=youtube+app+download+free+apk PDF link annotation
    • https://svltv.in/userfiles/files/47308900260.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/ec38f5f737e3d325f8a36f085bba786f/61118954993.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/73279484938.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/tixumopux.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613996529d52d---90844618334.pdfIn PDF document text
    • http://status.cz/UserFiles/File/lelurazuzopufosil.pdfIn PDF document text
    • http://nwatchonline.info/userfiles/file/lumeladiv.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dpbtaqsuitmbndib6b7iljqa54/5972001220.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134bd640548b---33259265455.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/gapubemixovof.pdfIn PDF document text
    • https://cfacgroup.com/uploads/FCK_files/file/sesinawipisu.pdfIn PDF document text
    • http://wieswioska.pl/userfiles/file/rigebetopam.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/66982956554.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/duvabikalurive.pdfIn PDF document text
    • http://futsalcb.cz/picture/vtextu/file/dusuwajosex.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/golusajom.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/fedapi.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161403b1a7ec47---85250892494.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ede528f5a5---85863898620.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/jereveremu.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/fazifuvafifojuzosib.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/jaxinataseguvamejif.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/38536583562.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/6206e4b75af3e9899abb1be656e6d655/24158156715.pdfIn PDF document text
    • https://subarini.ro/mm/file/mikavidenobufo.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/a7bnmlfanlvbgscs2qq7i26ma7/kigutaganojozi.pdfIn PDF document text
    • http://everestlodgelukla.com/userfiles/file/pibixofotulevefaxiloxaso.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_off0000ce8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8E 17756 bytes
SHA-256: e7b474e12ed08ad467a66027e9709929ad882650961a87b2956ed21345b911eb
font_01_sfnt_off0000fc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11440 10632 bytes
SHA-256: f2cf54b99d76cb2d31f8fd6c1764706acb6e13d9bb85c8fb878e53512e6ddd98

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