Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f06782ef95731b1…

MALICIOUS

PDF

78.5 KB Created: 2021-09-05 16:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 001eeb243bdf358d453bdd427cfe7f51 SHA-1: 74aa3c834cd78051a4af92a067eb39a22f4c4b84 SHA-256: 7f06782ef95731b1e776e532b8637eaba89184ffb17ec32d10991e764f96c082
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 http://teusz.pl/UserFiles/file/wiwujusapowabikivenir.pdf In PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160768b2ae98a2---29596417705.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/dotimusorir.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/supefiloweve.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/50350830608.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072205571b15---67321373424.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/63395653541.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93dff35876---31716951185.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16112a4a87813a---sugubiliwasobedajudetej.pdfIn PDF document text
    • https://506hlapeta.com/files/file/7603015819.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a3777eb65---29865866999.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/wuzixepexusexamap.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/waxafodudiliritalawele.pdfIn PDF document text
    • http://healthywithhart.com/res/file/38652198274.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cc8e93391---45404687714.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/35549393124.pdfIn PDF document text
    • http://alarm.pl/userfiles/file/mufozifuxumu.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/62573177842.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/xuwaworudizogegipegojalok.pdfIn PDF document text
    • http://nnhs1964.com/clients/a/a2/a2d7b74ded15306de89ee4bbe2f7ed3f/File/golesilurovitalusajiduri.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/a88c658464917ce602c4cf7bc548bbe0/52591033814.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3df0ab4dfc---pusos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=all+about+space+magazine+pdf+free+downloadPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0596533df5---84521870606.pdfIn PDF document text
    • 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_off0000ccfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFC 11332 bytes
SHA-256: ab98283ec126e45e34058a04ea855a4c1050dd50a666f177ec46da0789a86f11
font_01_sfnt_off0000e75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6D 17568 bytes
SHA-256: da56f3422b225932fcbc2b084ae9f4cb5dedddfa752959538bae8e07e57d081a

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