Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0302c631b3370fc…

MALICIOUS

PDF

85.9 KB Created: 2021-08-04 07:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d3018eb20b914d17dfa72db7010eaadf SHA-1: 7e2b7c75bb3b0092b37577d390370db6dbdd6083 SHA-256: c0302c631b3370fcd1bcbc16e4c28fdd6cdedf64af61eeaa9fda1cb6e2c9c9d7
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The numerous embedded URLs point to compromised websites and link farms, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, indicating an attempt to hide its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://oniceh.ru/uplcv?utm_term=henry+mintzberg+managerial+roles+pdf
    • http://darienhigh70.com/clients/878490/File/vutoviginiliz.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7b9602b67---mifewix.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e3a6070fc23---26310479181.pdf
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/goxofajofifuvefikutoxi.pdf
    • http://asianmosaicnyc.com/userfiles/file/53791738589.pdf
    • https://norservis.info/files/files/kakodusaxorarer.pdf
    • https://edu-mate.kr/_UploadFile/Images/file/20291509646.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/g6p7h4m56rrn1jrtii47o3sho7/50368455255.pdf
    • http://americansemitruckparts.com/d/files/32816125118.pdf
    • http://infrabud.eu/fckpliki/file/48112280670.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/tt0o2q1q2h03i7uo21qg4sr490/vodezafelenefavidimaja.pdf
    • https://parokisantolukas.org/Uploads/userfiles/files/selodutipabisuxu.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8518f53263---61752638696.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/555cc56cc28d373d80a7e50b9c478c66/bapefiwulu.pdf
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sesebomuso.pdf
    • http://chhsclassof70.com/clients/1/1f/1f6d1b94cf555b90b9f410dfa82aea5f/File/wanerowozebaxukosu.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/dmr3cml53c7d5jgsb9i3p4at22/81401597945.pdf
    • http://kunbot.com/upload/files/nidojizof.pdf
    • http://vincentpopetutoring.com/clients/d/dd/dd6b7bcf94cac99d3bed97cf8166637b/File/48488767462.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012552.bin
c1011524218332ad6929591a9c3e09ecaeaa16fe56ecaed7836359792a0a86b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12552 11148 bytes

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