Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed12904184f48fe…

MALICIOUS

PDF

85.9 KB Created: 2021-09-12 13:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 802510d89142dbbc607784506d2b78ba SHA-1: 31e50d412bf2874917db5f81eda59794395c9b4b SHA-256: 2ed12904184f48feed73bbaab03c6b143c68d5b1773d43e2a317f34593fb62d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous links pointing to various domains, some of which are identified as compromised CMS uploads or disposable hosting, suggests a link farm designed to redirect users to potentially harmful content. No scripts were extracted from this sample, but the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.humillacionyestrella.org/ckfinder/userfiles/files/68278679951.pdf In PDF document text
    • http://andlupa.com/userfiles/file/33967393346.pdfIn PDF document text
    • http://thoitrangvabaoho.com/Images_upload/files/92408465423.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/vixiruvekotaruj.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/71261847754.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/pipofizajixerolazererad.pdfIn PDF document text
    • http://asvpp.fr/pdf/24717404432.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/30705658294.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/fb867tna60q9uqei2abdr4ug86/71124352396.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/mbc9m37kceh0vh55fikmmg5t9a/modepebanuv.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/zisusufokakogafapa.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54256412748.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/11264651917.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/voponenaxujofikoxosega.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/mufidufitelukegepafu.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16134c338440af---nipiruvisufijemiwukilida.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/355991154.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/37876111445.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d894f4067---38960741916.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/44745953713.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/samipafugezujipunaju.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/dafatuxizadudajobemi.pdfIn PDF document text
    • http://theffirm.com/userfiles/file/26486535696.pdfIn PDF document text
    • https://bi-kiesabbau.de/cmsimple/images/file/70690947704.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=taken+3+old+gamePDF 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_off0000ed2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2A 17372 bytes
SHA-256: b0bad60afe9a97a95fd55fcc17d6ddf1f65ce88a2766e7eb6fe1d68439df52b2
font_01_sfnt_off00011a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001326f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326F 10360 bytes
SHA-256: e9f5712b4ab795cb73aeda048a50e4a6d8fadff0cf41e1ab82ce495fe95ea480

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