Malicious PDF — malware analysis report

Static analysis result for SHA-256 367e80004a888268…

MALICIOUS

PDF

172.6 KB Created: 2021-08-16 19:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4c4a69b41275d7f678a61deddc243aef SHA-1: 7748afdbecc35fb41a4849e599f9fb7f793a5349 SHA-256: 367e80004a888268b39ec0b1bd7761c77c183fa5f417db9650a13385c17f681a
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests these links are part of a link farm on disposable hosting, likely to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://x-software.cz/data/file/direbapirusapunin.pdf In PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/2bce5c30eaf857f4a0f52f218cc9dc1b/radaso.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e706c4c51---74699371734.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117368a52ef0---36041092056.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a701864872---rajogiramo.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/is4adhvt9o3raic2i07likd4kf/84302642009.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ceabd2fcd7---sogagapagopewi.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3e89a9b27.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/gekevododemijalaliw.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bcec5253f---74420694163.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/44623050326.pdfIn PDF document text
    • http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/43947414942.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/xuviwofale.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/letawaveni.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/juwozitekomido.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/ravoderutazinojiva.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/78736247946.pdfIn PDF document text
    • http://lagrupacio.cat/file/80069344814.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/ligogu.pdfIn PDF document text
    • http://primehorseproperty.com/userfiles/files/66827611886.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/33921644169.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16115f3dd23a39---xesivodot.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/73407145117.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075f3350ab6a---konuvepojunax.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/49dcor1jo89fm5kioq393eqne6/wetinivodutesikixe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=descargar+biblia+de+estudio+plenitud+gratis+espa%C3%B1olPDF 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_off00023eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23EAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000256c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x256C1 11136 bytes
SHA-256: a07793b477c707f922b5b434274648d0b42b9f1a6d9b21699bdd729027471698
font_02_sfnt_off00027033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27033 19388 bytes
SHA-256: d864f4aefba88a402ef2aff1365985c6a8c5968e5879a75ee9c43cfd429f6495

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