Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2cc6f0283287b97…

MALICIOUS

PDF

75.9 KB Created: 2021-09-27 01:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5447b2bb5e4ac83212dea2197ef1865f SHA-1: 8dfb5519482fd30562ef24a30248a193f6377703 SHA-256: e2cc6f0283287b97394cdcc1f31523373c473b56ab22f79f0cb815d69740a155
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads. The presence of these links suggests an attempt to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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
  • 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 https://prestinieurope.com/userfiles/files/38209372918.pdf In PDF document text
    • http://studiovalentini.eu/userfiles/files/mijagifegajove.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/aa53c7ba1b1af3bce47248e1fb5e4e12/69733753746.pdfIn PDF document text
    • http://zaiger.ru/img/file/14431120509.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d178b33af---wiwanopomu.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/mawenexetixitovisuwufugol.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210903075309_7ldl3h.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/3617716565.pdfIn PDF document text
    • http://mybyblos.com/userfiles/file/86667102723.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/kafenoruxo.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/2ac050105c2829b3301c44f6d61495a8/64336356637.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/72343650613.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///22226683485.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/853b6a134c533c1caee9ad3854e110e5/65118982457.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/210926152430675457xobosj.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614832e46b2e1---53857714194.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/24276434107.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/zixum.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613017f5862d5---38050894787.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/wonadupaboxuravatijufa.pdfIn PDF document text
    • http://envigest.cz/upload/file/14546040652.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/4114247096.pdfIn PDF document text
    • http://pyramidplaster.com/file_media/file_image/file/pinejozuxod.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/jezazikukoxo.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/waparuzokeset.pdfIn PDF document text
    • https://lideregitimpaketleri.com/calisma2/files/uploads/75384328561.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/rugapuwululuwinepomakufi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=cloud+tv+apk+premium+crackPDF 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_off0000bebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBF 10692 bytes
SHA-256: 9d97d909be3af328089d830fe9e263c43dd18dce82b66fdf6ca7efd33432a9f9
font_01_sfnt_off0000d754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD754 19340 bytes
SHA-256: 796a133c15217ff81e8b25ed9251849fc3e4d77aec5bfc6d07a37dde5c72b451
font_02_sfnt_off000109ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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