Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61a181a905cc547…

MALICIOUS

PDF

77.2 KB Created: 2021-09-06 19:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7927bd72c3913ceb6b1cbadc7b0bf435 SHA-1: 14d91130aa5dac064fd3a6bb9e024e80e1bdaac5 SHA-256: d61a181a905cc547ec5c68048e2de89526c43967130d985b51a67e6ef888e8f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting domains. While no scripts were explicitly extracted, the presence of numerous URLs suggests an attempt to redirect users to phishing or malware-hosting sites, aligning with T1204.001 (User Execution: Malicious Link).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://madmojo.com/fckupload/file/betavijosiwanuneden.pdf In PDF document text
    • https://gbagencement.fr/uploads/file/41824336596.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/moxilawegoxivopuluso.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/1c0be6c6fc3a5b9c4b453ff6891059fc/79516794806.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/d99292ab1889e3c84cf6e70c490a488e/3934857717.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076298f42164---foxam.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c7910b6ead6---51464222194.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/widosivirolilogi.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/74707375458.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/be35c028a7a39b1e5f88afdd6b178804/63349543037.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/2944c085021e828bf05dfe55af044be5/86056303729.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/15830759876.pdfIn PDF document text
    • https://bonacorsi.it/file/4973135661.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/f73bc1462c5a50de45444b1c870563a4/1080413405.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/283bca19c573bf37489bb31cf2f8bef6/rekaz.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944f4c9b353---gilurujibeditafuw.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/bizejijasemunixefosotu.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/d74a95c95e75f0cb8d2acd71d9d34de9/xoguwasugonizatimomoli.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/vafolupejefoxarekuwav.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/j7r80luvid0t564nntn3nj9ld5/81131634810.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=bo%C5%9F+d%C3%BCnya+haritas%C4%B1+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_off0000c607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC607 18932 bytes
SHA-256: 52062f49f205f65c410906c04ef580a05d8452fdd7503e94df93371acfb77904
font_01_sfnt_off0000f4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD0 11064 bytes
SHA-256: 2808e2ed5151066949ecf53b08da4b6d57b60f52064682e4dbdad99fea6b2d10

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