Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ad75262b7e18e7…

MALICIOUS

PDF

82.4 KB Created: 2021-09-11 22:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1609d85c77209a1aea8ff8ea020970e5 SHA-1: 7ae3b0d62421f257878e832df8b606b762a2bd52 SHA-256: c0ad75262b7e18e75fb2177d9707d570266905969c37c997418234fdceb5b0c2
204 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. Heuristics indicate the PDF acts as a link farm, pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of 'Powershell V1.0' in the document text further suggests an attempt to execute commands, likely to download and run a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 https://canoe.ro/Extras/ckfinder/userfiles/files/nevatofixemujujil.pdf In PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302efa01122---79335693567.pdfIn PDF document text
    • http://gammatradings.com/userfiles/file/popifupekugirifu.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/sepobow.pdfIn PDF document text
    • https://xn--atpta-nfb.lv/images/userfiles/files/46166116578.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/71727557306.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/68706341958.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/pigejejuke.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/porebazerinagapigobunef.pdfIn PDF document text
    • http://hanaelectric.com/userData/board/file/bogutizukukasezusalida.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/82934325484.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/cc61ad9482e80cd6e28bc0c3563e4a65/jagadetomaromekulujobeg.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/vutokoz.pdfIn PDF document text
    • https://valleyrentals.com/userfiles/file/56879751916.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/54029652121.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///zoxikijesuligonivavebop.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/62951365663.pdfIn PDF document text
    • http://av72-reklama.ru/userfiles/file/1630993010a4478a66bee9812b0804.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5a010f730---78904176710.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/pakus.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/c08d6c49a8698417a63e7cb2d8d6e4ba/65788503972.pdfIn PDF document text
    • http://afro-safari.com/upload/files/xinomafixamutujadozuvot.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/17502996740.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/161305d75b2475---86399933539.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/30691808016.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=word+to+pdf+app+for+pcPDF 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_off0000da85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA85 10064 bytes
SHA-256: 800e36d56d1637f8c484959c0d5d324ce94981788fc85f79dd1854693aa553c0
font_01_sfnt_off0000f104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF104 19392 bytes
SHA-256: 42d2030567ee95311cdd703f2041ac61b90f30d2c43594a90df22d224dc7c0ec
font_02_sfnt_off000123a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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