Malicious PDF — malware analysis report

Static analysis result for SHA-256 70576ea2056c844b…

MALICIOUS

PDF

73.2 KB Created: 2021-09-14 18:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bbeebe76c35970ca16b696fb2e41f85e SHA-1: a04470e798e3830d406e968d172750caff95ad1b SHA-256: 70576ea2056c844b344434abaaed3d9d838f8bb05b16f6a037c913d38bb4639c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to other PDF files hosted on various domains, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The structure and numerous external links are characteristic of a campaign to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://laborke.ru/uplcv?utm_term=excel+of+pdf PDF link annotation
    • http://ritadas.in/userfiles/file/88995591399.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135930f02705---8664931725.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/57204823257.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/togosidazomajexove.pdfIn PDF document text
    • http://axwelindia.com/uploads/20620640309.pdfIn PDF document text
    • http://maksimetall.ru/files/20770179559.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210901_19CBC390640B4BDD.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/nexunugefidigubutul.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/jijonoxavumobubozegi.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/kalef.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/13195662931.pdfIn PDF document text
    • http://transporteslaplata.com/imagenes_web/file/95108553899.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/sutisepidizote.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf36c4a43e---sovitunemawevet.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/nezazovokivabemago.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/51553628541.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/beriwanojomolezoxuru.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/21387932424.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/polilavitukuwivix.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/68245026097.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/bekuruvufadavawafukuzipep.pdfIn PDF document text
    • http://marketingnews.fr/images/file/65383936344.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/2e1012cd5e16d11cd55802db64a498d3/ferexotona.pdfIn PDF document text
    • https://eol.org.pe/ckfinder/userfiles/files/36252395410.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/93670895921.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05B 9972 bytes
SHA-256: f1d9a38c887d4dafe02e680eb432cd92e3bccf0d2b05cbd32c28ae4c15979518
font_01_sfnt_off0000d68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68B 15920 bytes
SHA-256: 54cb20eebb33e363e8a6ee7bce1347aaad35139f4a79b621d9644b657cc774a5
font_02_sfnt_off0000ff16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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