Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b3f27c6d64d751…

MALICIOUS

PDF

82.9 KB Created: 2021-09-18 04:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 059b7df828e5b42f192f0466e09af273 SHA-1: e92a6d28ee3d27c79b213ce9677c730d720ef2ac SHA-256: 47b3f27c6d64d75153b88fd62ba5c7f434194bd6aed5456526b6de4ed16b5373
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway scanning. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=happy+wheels+play+store PDF link annotation
    • http://dnepropress.net/files/file/tunag.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/vuwot.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/saxedapepa.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/46999788060.pdfIn PDF document text
    • https://kaskad-74.ru/images/uploads/wanusimek.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/20270496359.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/xuxumaxemesasi.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304d2eccfb9---gokafi.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/1222084172.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/35642882292.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/zipigijew.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/96970632629.pdfIn PDF document text
    • https://pr-dienst.ch/file/zotemumotomufejuraz.pdfIn PDF document text
    • http://parilka.by/var/upload/file/44030058695.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/joran.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-16/210916220136027473h97crvsd9v4h.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/dolubokabedurarukomor.pdfIn PDF document text
    • http://ukrfirework.com/images/file/38711172687.pdfIn PDF document text
    • http://canadianrockies.info/files/file/91041093407.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d98b6e3afc---dogatuwigesarujosevi.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ae05939e1561abb0ab32176631be5b04/lewisoveparu.pdfIn PDF document text
    • http://velisend.ru/photos/file/43918550652.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/bbfeef6038f0b139c4f8602e933a0f34/feviravuterokak.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/39577371731.pdfIn PDF document text
    • http://robedecreateur.com/img/files/jamivaxafesazuk.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_off0000e212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE212 17000 bytes
SHA-256: c838f31af149e451fe2458a60b06e128a66a1d38d312b508dcb3d11acb368e12
font_01_sfnt_off00010e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12638 10344 bytes
SHA-256: 1c574132a0c08f188193bcdbedb44c7321dc974e32ec23f6f6ca336017f6aa68

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