Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2426c9e24f61c2…

MALICIOUS

PDF

88.0 KB Created: 2021-07-31 11:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f2b1703a2a617ce19862b77d199ad257 SHA-1: b7c25130c7eb1f041eb843d11bb8a5a8414c8087 SHA-256: 9c2426c9e24f61c2621c21961000b3b1920cbee030e83c64ba2377657a760166
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress upload storage locations, indicating it is designed to lead users to malicious content hosted on these sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c862d351412---vobamupe.pdf In PDF document text
    • http://atomleasing.ru/media/File/17040832610.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/bidefosakajopagilifugonup.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/kureta.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/555034199aaf51807d24ae49bae2432e/dovuvedogusuvofavugogodep.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160cda58303f6a---19435547268.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b43235876---70322360408.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e771431be55---29334998843.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f62143356a3---73121915942.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/qc0dsvf4eq3ijr8kf67tfro9t5/mutikoreponevemebuf.pdfIn PDF document text
    • http://weingut-suppan.at/files/kivufuzadolozidilalax.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/77751514597.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/febuke.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/lefofuxusi.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/53381577207.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/rikumilunaredu.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/62092476231.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210705_6D46C557E0A9A4F6.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1bfdab148069d8de5ea87cca858dcb49/8898432542.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd3218a7a1---27439254750.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/92023084951.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608621262ae6b---81012601429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=when+the+sun+in+the+morningPDF 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_off0000f50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50B 18332 bytes
SHA-256: 6d02972b3c0674cfc0ed11194febc22f3d554c1a5587733b2c03a5f39aa1529d
font_01_sfnt_off00012468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12468 10440 bytes
SHA-256: b7a6b9156a6a950dec330546dca66012a7652b84878061ffbcb60627b70a8b5e
font_02_sfnt_off00013bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1