Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0eb56874369701…

MALICIOUS

PDF

89.2 KB Created: 2021-07-17 04:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e2ee9bebdec9944020a1a325ace17a16 SHA-1: 2f060ef061aa702606afc29c769d329afe446198 SHA-256: 8a0eb56874369701e4c7a76d5b15f23240c30f8d8b3a062047d8e9876699066f
236 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers. It employs social engineering tactics, specifically a 'ClickFix' lure, by instructing the user to copy and paste content into a terminal, likely to execute a malicious command. The document also contains numerous links to external resources, many hosted on compromised websites, suggesting it may serve as a dropper or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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 http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846a64f0bf9---karirunovapunur.pdf In PDF document text
    • https://mvpartners.be/images/uploadedimages/file/xurumupokolezivupux.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/21b112b379746e68383e7b9fa28f054f/95516456215.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/9937496240.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/6607414381.pdfIn PDF document text
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/vewafitukebijidabaselevup.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/tipexege.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/datebobakegazasaw.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c4b631c81f7e053ff08d4868f813ac96/rozilebigobisufibol.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/60565796457.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/vobomubasem.pdfIn PDF document text
    • http://cartopack.com/Images/file/49883256369.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/74134260823.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160774d950845f---30755059049.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/b1aed26fae0a1ffddc0f7159710e0943/ximofikuvezibixamuvap.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4ec1e7fbc---61515746990.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/31822725923.pdfIn PDF document text
    • https://actor-conseil.com/files/file/74463391249.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/qlf90m4vcfq7lqvlqgk2haqlhr/timolonot.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5d47b99995---73304225719.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/xirelopobuvuvazefuwin.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/rrdiblkgqv0e9775pbtc5ntp9f/tidajopepimekabu.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/f06a5d06f32c39d788afd27fb0bc6d42/vazuwibi.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/bed953cfe5b51413ece668964eab7f73/genunuxagajuxevopapewafem.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/gowoga.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a2a08333b---87972501163.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=ffmpeg+avi+to+mp4+h264PDF 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_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5A 18472 bytes
SHA-256: 4bdbdb7c2e9fe73c8be19c52213be70c49c23fda259c2180268b2814adeffad3
font_02_sfnt_off00013e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E5B 10796 bytes
SHA-256: f94940c0fc59e582b263e9a6f3d1930e96a13e9e3f9149f093bb48b2477a6bb0

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