Malicious PDF — malware analysis report

Static analysis result for SHA-256 2576de8daab80fd5…

MALICIOUS

PDF

86.5 KB Created: 2021-09-03 09:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9fc8aae93bbe485f622a54518e9340c7 SHA-1: 09c89a3e17e034488f15489c1f6f54161db83e85 SHA-256: 2576de8daab80fd51951a85d99c3d22aece216ffcab74db01f870683d2ec1055
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://belloverde.net/emailer/file/4078702109.pdf In PDF document text
    • http://pneusmarene.it/images/file/27234090234.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/faliw.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/82793504013.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/l93d9j1d6tfectru0niu7et095/76695830704.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/lokagivibagutemir.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/14889163272.pdfIn PDF document text
    • https://eingangrad.ch/userfiles/files/51174351986.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/49e4371d074b7c875dc69375e26e20f9/72734441096.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/86458757123.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e63d1529fb---8970087227.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1610061923110c---sirupeli.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202108282006290380.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/ssidlfu8jlcnvosg9kamfn9mtj/lofavexofusoxewesijifitat.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/60296078114.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/xodabakaluzures.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210718_A36F4D446FE86126.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/ec9eaed454d3a16df1cacd11e84588a9/bazozugonuluzoketixazipuk.pdfIn PDF document text
    • http://www.heatandgas.com//EditorImages/file/52286915099.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/videnunadotexij.pdfIn PDF document text
    • https://southwestlooms.com/admin/userfiles/files/xugilagebetulawefegi.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/2gfbuvofhb5m7n3g11k4pl369f/56041212867.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/zezewubexuba.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087cd8da0911---xufopede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=ortografia+y+redaccion+ejercicios+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_off0000e70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70C 11020 bytes
SHA-256: dbebb547f36d73b250c2df190b469f37f000e8db771163a4b81a3ae1ea561a3e
font_01_sfnt_off00010098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10098 20216 bytes
SHA-256: 21a1455aedd8bcf72bdce79e9021dee144bd63b77fb0bad3572b5f27cecd1411
font_02_sfnt_off00013463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13463 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.