Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c23a0253a2c8a4…

MALICIOUS

PDF

85.8 KB Created: 2021-06-27 14:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6d09dc2c57ac60ab817fe79e752c60e9 SHA-1: 8bb7c1b8b0518eb4c9652eee2e8d006ab73bb56e SHA-256: 13c23a0253a2c8a486fc321781de96ead115813e9c6ac5e8847838b093b3db98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, directing users to download a game via multiple compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to distribute malware or facilitate phishing. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to exploit user interest in game downloads for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.moyekolodin.com/files/32637409143.pdf In PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c26f80d5e12---bajumafixogudixufital.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/dc1bf0ee493559160ea0d12b3b89c288/mijav.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/b71d60723a53ace21ed47c8c189fa6a7/2967148069.pdfIn PDF document text
    • http://manajrgvaaradhi.com/cms-uploads/files/34268981415.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/rovexemezuselepipogataweb.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bd59b2e8d---tewosidijibalonaj.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/voxopapijuzubozabuselel.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/zaladalisumifurubenalif.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210513073212_486691042.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076e39979be2---dunitomivamiwi.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/jifowunuwasisozikop.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/m464lgvuj7h64hsjqitgo23d2i/muzavodonajiwufejoroli.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/bolokupoputuzivutij.pdfIn PDF document text
    • http://pestcontroluttara.com/ck/upload/files/rumurufaza.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/fe47be834f43ad7402f0eca7f2f8e132/16521650584.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cafbaa2274---78277121970.pdfIn PDF document text
    • https://mides.vn/images/ckeditor/files/jodavogotelogojixanogo.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/xatigufakerikuralojoxovo.pdfIn PDF document text
    • https://stbenedikt.ch/userfiles/files/satosamasul.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/lowisuvasizaraxajatowow.pdfIn PDF document text
    • http://fabtur.ru/upload/files/49407669295.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/025e2b3c9ab43e803e2f131191300f65/jatigabowozobaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=download+game+need+for+speed+pro+street+pc+fullPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC15 16800 bytes
SHA-256: 9afa12cfb1dd7064fb43c1cb0b9eeeab38d7fa18eb57ae6283dceaef84de0eca
font_01_sfnt_off000117fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FB 11056 bytes
SHA-256: 8da49e8ea9b42a172e68b19b769ec4da85d21cc5a78ff349e049d56f6ae8346d
font_02_sfnt_off000131a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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