Malicious PDF — malware analysis report

Static analysis result for SHA-256 faeb9993d7234ea9…

MALICIOUS

PDF

86.1 KB Created: 2021-09-11 18:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bd1a4a51f862de2094d2f0e993eedefe SHA-1: 490f91654d0f153296caae09b0b9d5be80f875a9 SHA-256: faeb9993d7234ea975e0390a164af5a35e9f995df45f807760022d61225e0795
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely to distribute further payloads or conduct phishing. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://travelbilet.ru/sites/default/files/file/50574150714.pdf In PDF document text
    • http://atut-biuro.com/uploaded/file/sixoperivewowotubakip.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/gavawuzo.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/61527644945.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/95078043816.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/vozadun.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/15177364136.pdfIn PDF document text
    • https://cardolf.ro/files/25881978886.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/ef565fe3a350b553eb628796a240ec8f/zevofovilepexax.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090506323973499.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/gikogatali.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/7911969764.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/01/gugaduzegi.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/rinomojoruw.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613995fb104f0---gujosapopup.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/madovekexemav.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/bojobig.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/96951115723.pdfIn PDF document text
    • https://kotypsy.pl/ckfinder/userfiles/files/favolodano.pdfIn PDF document text
    • http://nationalherbo.com/userfiles/file/88717854742.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/53293762736.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c689519abe---82166738745.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/xazano.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=minecraft+pocket+edition+download+free+pePDF 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_off0000e540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE540 20148 bytes
SHA-256: 4aeeec9db7b07784e1a90b0bd884be2cca52a56e30521701ae664441b22e3a74
font_01_sfnt_off00011a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A29 10616 bytes
SHA-256: dd92a860161eca2653031b9447ff208bfc595f0a8955c9b8e8c04e9ab541fe03
font_02_sfnt_off00013298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13298 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1