Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fe567090f9204c…

MALICIOUS

PDF

62.3 KB Created: 2021-09-16 08:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 90d90a429abf37ff47443118a403b4e4 SHA-1: 949906978b7844857a8e3a65c73b06d92c668092 SHA-256: 79fe567090f9204ca355bf275f543e282ca57b5b5a6d5e6d0b5a6133eb8e443b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7000

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 http://kientrucphatloc.com/upload/files/mojerojekunubidabag.pdf In PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/mozokipur.pdfIn PDF document text
    • http://imbirimbir.ru/files/wunifoliwajosugode.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/2906038892.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/73560548681.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c18459c8a2---vanenotikolan.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/pewejopiborobumanig.pdfIn PDF document text
    • https://pecsikult.hu/files/file/82460227286.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/zumoninepitajojapemuso.pdfIn PDF document text
    • http://bptramptour.pl/files/file/79082802505.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/54951848996.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/7ldcblerg7lc6m9rdukmhb5eni/jozerize.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/gotivinidisejamizi.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613fab94cb989---39261349604.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161427af8d44e2---bumipevotukivarudelane.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/luzukenafuribuxoge.pdfIn PDF document text
    • https://hiroyoung.com/data/files/jopebagesivebufif.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/57820189362.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131899174ddb---17644246967.pdfIn PDF document text
    • http://jaatkinson.com/userimages/93938560221.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/megesajo.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/66746912533.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141dd425fbda---ladenu.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/kirarekawufetixojupaker.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/paxit.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/pisumamajesazumepifelo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=language+navi+app+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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