Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee697df79c76d8ec…

MALICIOUS

PDF

78.2 KB Created: 2021-09-05 00:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b5dd5273461470442365116c9f323afd SHA-1: c8e44a91f1951bbb2436ede516a33ff9fcb5f215 SHA-256: ee697df79c76d8ecf201c6d28b3f5d560b2ee500b22b1c3ed505a69547670228
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious or phishing content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://evpltravel.com/xv_image/file/83196630688.pdf In PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16121ad442dd95---13718547093.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16100c704c29c3---vufutasoxekajupoxigas.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/899c4d797fbb4e979268d9b0235fef0a/biwudoravizararubewiguwu.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/datodakixuwomazuv.pdfIn PDF document text
    • http://yulintimber.cn/d/files/15385028080.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/66abb6eb125ece779af2489388ddfde6/20725850903.pdfIn PDF document text
    • http://drlalashow.com/php/billboard/uploads/file/16185264975.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/94814634323.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/11104472355.pdfIn PDF document text
    • http://benjamin1908.com/clients/f/f4/f4560e3fe432b95d15e234f900dec36a/File/xajaribominelexifenibagas.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/92e800cf522a76b2f35dd974c17d9a78/71654748873.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/xamelofevamawipukixir.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/53136835493.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/dujilazibigebajimijojuz.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/zenotak.pdfIn PDF document text
    • https://argumentua.com/i/file/88264622502.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/siwagukegejum.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/12428676093.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abbec1ea6a0---14214183783.pdfIn PDF document text
    • https://jotelek.hu/files/file/64112310259.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160fc553cbbd84---runijutogoza.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/0a12361c6853f498a01f6ca115269512/lafojufetosoramuravaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=full+circle+class+10+maths+pdfPDF 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_off0000cc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC43 10912 bytes
SHA-256: 9b89429d1fc2e9df61ffdae022255f9523c3a5a39dd34f79d1f67f9910c276f3
font_01_sfnt_off0000e591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA3 17928 bytes
SHA-256: f49a85d03246b1f8debb26d17468e9e04137d291c0a6119f1227d2ae6ff31d87

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