Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e696ca16fbad73…

MALICIOUS

PDF

81.2 KB Created: 2021-09-07 01:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 96de64803f04c3d22a5da0b8081d6b80 SHA-1: cbfe5b7f8b6dea9119248ccedf4542397f414b34 SHA-256: 67e696ca16fbad73e455d956f2fbd7bdfadb10cb5236efc48fad013358ed79e0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The presence of numerous unknown URLs indicates a broad effort to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://asremajazi.com/uploads/files/50894558450.pdf In PDF document text
    • http://beiwendq.com//data/attachment/file/zaxesolesizu.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/widebinunikogezigovomol.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf20a2effc---22771223725.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/pepefer.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/zililasoperamadis.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/19904550887.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/f346b3c4bc5f35287d18d34a0f6096b6/sidagatebusavi.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/budagobetuf.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c84bd0a0a5c---63991108372.pdfIn PDF document text
    • https://tcremich.lu/files/files/4278605019.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/38508229678.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/96941490735.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/6fvgaef2ghpndrq9kflvlplkab/mutitofibuxisepefeli.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085d63bb253d---73309286718.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/6260624354.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2b4d9961a---xumavimojivipop.pdfIn PDF document text
    • http://ityab.com/cache/fck_files/file/49710225929.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/xebeguwuwaf.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/f619a8fa23f96add266e0c61e0957f58/5044286437.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/xinarokevekevotedu.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609340c9e9f31---86405283096.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/34021398311.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/64496095101.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddd9b96bbf5---dexolawesovorefekexomone.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ikea+l+shape+sofa+manualPDF 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_off0000daa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA8 17440 bytes
SHA-256: e48730b8127df4e12cb81827d56bb6896e63a21b839c094b20c71fad33d1ab10
font_01_sfnt_off000107f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001200c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200C 10476 bytes
SHA-256: 35577251fe351b5b0215f1207a4e2667c24c2c2d53b72eac15bc7a21a9eb1cd6

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