Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee557cb7e91f6a79…

MALICIOUS

PDF

83.0 KB Created: 2021-09-13 05:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: d902b509eded3b4c23c96e457159adf5 SHA-1: d0ca52e1cd26693e3de563c6e3a45915a9507e50 SHA-256: ee557cb7e91f6a791a648b71233e5dc12fff23a1a4c4f007bf91bb9582e6308e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms or disposable domains. The presence of these links suggests an intent to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://conomiya.com/images/uploadedimages/file/xonitubopaduj.pdf In PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b63167c62d---wiwuwejavi.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/46722182244.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210908043503.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132313f92dc1---29368919599.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/59872815130.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/84821930245.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/rufesaguzup.pdfIn PDF document text
    • http://gibisch.biz/files/files/36339556450.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/12090566128.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/95fb10334cff701444a15b6494632f47/pazuzatedafitudupi.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/refazigedodi.pdfIn PDF document text
    • http://irollee.com/userfiles/file/titupat.pdfIn PDF document text
    • http://www.gitialiganjlko.org/ckfinder/userfiles/files/74596862340.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/mozakaloxikimivewirinejak.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b02d791e62---90746888561.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/90490792704.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/ladufanazebuveli.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/v63lc2krjtnb6fr5k5io8rfht4/47503657332.pdfIn PDF document text
    • http://hytechcommunications.com/userfiles/file/51105555381.pdfIn PDF document text
    • http://ttfi.org/app/webroot/userfiles/file/lofugepulubosax.pdfIn PDF document text
    • http://biswasi.com/userfiles/files/85486346488.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/28935731563.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/39829508527.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=english+file+intermediate+workbook+answer+keyPDF 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_off0000d8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F5 11216 bytes
SHA-256: 281704850a2cdd28ffe44025d4a11cf55bea41f73e4f1f3d3f6ca268fe7ab261
font_01_sfnt_off0000f2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DB 19276 bytes
SHA-256: 17e5affa036a6392504a3e3cbda1f6cc7322a4a8358722404dda9f4233409789
font_02_sfnt_off000125d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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