Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4a01ece1e6ea4c…

MALICIOUS

PDF

238.6 KB Created: 2021-06-30 03:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 82269595230d3e94aed9b27e0509f89e SHA-1: 18bd8bcf5f89c9ccc66fbce29caf448d053115a2 SHA-256: 1d4a01ece1e6ea4cafc3453053458bddb69c1924af0a6c2bbd24ec712d44fe4d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as a phishing trojan and a machine learning model indicated maliciousness. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document contains instructions to copy/paste commands into a shell, a common technique for executing secondary payloads. Several URLs hosted on compromised WordPress sites were extracted, indicating potential download locations for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

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
  • 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
  • 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.
  • 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://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607019e7a48e3---ropimakejikuv.pdf In PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/midetalolidobaxuxi.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/69822189985.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec0acbeb15---37310025504.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afd207051f---solij.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/kesewemimokafijusesijope.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/luvibowakufonirobopanuxu.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/lexipubekefug.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608491b0bbac2---91067244358.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/63170118230.pdfIn PDF document text
    • http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/59435838569.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/5b0174451680836697c294d6ef32e1bd/dozobizuj.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/mejeruwobodusosanumewozu.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/41795318056.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/df54a31eafd46c41c182627733291434/lezagebe.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/47859737370.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/kovalurinegis.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/7080197168.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/ruxizojoxobetivosivi.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/tugonix.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160738e8e19eb2---purovokemesubir.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c64358b94fa---baxiwewixerabulow.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/hms3nq9qo4hrlgvm536cgqejtd/53138587034.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/84165717784.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2da041827---mazojusezuwiwabuzir.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/9568f5e049184673819e78946de25dd0/9078262844.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/dojotoro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+mla+handbook+for+writers+of+research+papers+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_off00034695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34695 11164 bytes
SHA-256: 5d39920a48f8b6fced5f8e9a686990f46b8a6354ef7c67ecd89001c18a193551
font_01_sfnt_off0003604a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3604A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003785c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3785C 19136 bytes
SHA-256: 41c70680ae0f4b57a13661c4cb2dca650f1335da8e1c3c962a66d07ab0e26f48

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