Malicious PDF — malware analysis report

Static analysis result for SHA-256 8062650ac66c7295…

MALICIOUS

PDF

80.9 KB Created: 2021-09-11 09:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 91d3fcfcebe996df2223b77198dd7067 SHA-1: 6ca64d4dab9b31626595b1a50716f80a92e2db9c SHA-256: 8062650ac66c72958177eaee89f3417cb14b3c1df5029e0448051091422d8a67
194 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URLs, indicating a malicious intent to redirect the user. The 'Clipboard command execution lure' heuristic strongly suggests the document is designed to trick the user into executing commands, likely to download and run a second-stage payload. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/iogifl2q58gi7dse3pqsn1o8sq/7009757756.pdf In PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/kexurinibulikogiralekeluz.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/74017137750.pdfIn PDF document text
    • http://finchamauto.com/pics/53090226269.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/bokurelumopi.pdfIn PDF document text
    • http://sjzhtchem.com/upload/files/10145283677.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/8105406394.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/kogudoxorexof.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/97359812936.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16139d19dc9f26---kebinikidajupololovosajed.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/wabunixifudo.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/lanawabamatasir.pdfIn PDF document text
    • http://onestep-tokyo.com/userfiles/file/78062616085.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/mukabetepefe.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/24078732604.pdfIn PDF document text
    • https://lecachet.fr/docs/files/zepulanegamowez.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/03/76067883003.pdfIn PDF document text
    • https://bookmyexcellence.com/bookmyexcellence/js/ckfinder/userfiles/files/80279795082.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/22921271627.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210911002430.pdfIn PDF document text
    • https://birotex.rs/images/files/lubonarelapujugewipibew.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__6135224D5D6E0.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/91302205882.pdfIn PDF document text
    • http://17njl.com/userfiles/files/20691760807.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/11533052542.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/delivorawo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=custom+os+downloadPDF 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_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 17468 bytes
SHA-256: 35b12c7ff66fd6ef64f8481f086ef2fc8f07b493ec3180c121f2d167549547d0
font_01_sfnt_off00010709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10709 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F20 10300 bytes
SHA-256: 8b0015dcbb32f4d2c456df7d2d3e149eb596a7cb122e6db6a4913e58b067e0ed

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