Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9712c3f78558e0…

MALICIOUS

PDF

85.9 KB Created: 2021-09-02 23:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ea412df548e450da4e5059ce323bb531 SHA-1: dcdb917ef34a2c8954bccbb0907689f3ed6f1221 SHA-256: ae9712c3f78558e0e5b73bb0a9445e39d37f8f7b539bb7a45eb88a7c1b8c41de
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, indicating an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript suggests it may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/48f1c949556f910502fc94ecad26adf7/memolawinotimi.pdf In PDF document text
    • http://adabaskimerkezi.com/upload/file/26555303125.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/27605585557.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/49029845576.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/70311499391.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/5531234990.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/piralesipasemi.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a89263067---28726045270.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/210877ec05a240135a2c8766767427ec/95800780985.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/85896641799.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/219a2c590fc8a78ef47b3ee515c46b67/vufukovogojubozufodiwawe.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/9iq5d2car4pn84qq5d7o68mlnh/bokozusobividi.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/wefurabuxu.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d443a45ebd---xuxerobeguges.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25545a61bd---3741622681.pdfIn PDF document text
    • http://datacomsystems.cz/userfiles/file/guduled.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c17b9b9825---76451443410.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/57456605593.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/nogutikolirarawagodebesup.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/gbd4hqeh2jp6bgneju747oe27k/givonalekowes.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/tedobolafe.pdfIn PDF document text
    • http://cocoal.com/uploads/file/jubasunubupewunivovuz.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1755a0c62---gukil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=short+essay+on+poverty+in+pakistan+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_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 10896 bytes
SHA-256: 138a287baa3ea5004a939ac67d488b81d02db7df4fa482127e7e4ac843c8a5d1
font_01_sfnt_off0000fe3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 19736 bytes
SHA-256: b47b021818f33a69445ec60fec57ac247a77251c1d10cc1e3d5442a0ae200627
font_02_sfnt_off00013217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13217 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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