Malicious PDF — malware analysis report

Static analysis result for SHA-256 7014967388864ec9…

MALICIOUS

PDF

79.0 KB Created: 2021-09-16 17:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c6809ae07d860c7c3c39fdb4a26a7184 SHA-1: 2ca9ad0554f01f66a7f0a3eb0b8975232dccb9e0 SHA-256: 7014967388864ec9f75ae9c7f3b53cba502ad2b398e4c6c0801393e8a2dbccff
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various domains, some of which are associated with compromised CMS uploads or disposable hosting. The presence of a 'download button' lure further suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • 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://philabc.ru/uplcv?utm_term=galaxy+watch+widgets+download PDF link annotation
    • http://aedjtjdshbf.pretty-match.com/upload/files/43429156433.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/52418067153.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/452587ee0c3b7aa2541259102639afd2/noboxi.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/nogotefijogofovekujap.pdfIn PDF document text
    • https://emprenderem.cl/files/misinodokikoviruwe.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/guzomifojijelasaxikovar.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/18950955604.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/80344834767.pdfIn PDF document text
    • http://guowangcable.com/d/files/tifisurowepo.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/3a8366198d20bb2b31a83fe780ac8887/vukalonu.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/togolixuluguvinisivaju.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/29090168899.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/0l46gv8p4gupjmhrp0feb4d8f0/85900708944.pdfIn PDF document text
    • https://bataretak.com/img/files/file/13523519199.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/nikulipufimeduf.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/30615112911.pdfIn PDF document text
    • http://honda-vo.com/upload/file/18124780731.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/judotexulefafakulal.pdfIn PDF document text
    • https://zlato-invest.cz/upload/files/jusisadukeripi.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/80687410839.pdfIn PDF document text
    • http://xtra360.net/campannas/file/16484344185.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/wowewizijukenetafilazipuz.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16140be05a1687---84751344897.pdfIn PDF document text
    • http://tamtamphat.com/upload/files/3429799228.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_off0000cf0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0C 17728 bytes
SHA-256: 0baff3290eea1bfbbb5ebee8e2a99556c6fe327d2f3c8f38c74645f19b2d3c3e
font_01_sfnt_off0000fd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD77 10892 bytes
SHA-256: 5d18de7a08372c8b7e8567e7ee7f2998f41d76592b8f54d08ae6c439292b57c7
font_02_sfnt_off0001168b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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