Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c473630456d8927…

MALICIOUS

PDF

80.5 KB Created: 2021-09-11 03:36:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 389c6ce9a88c13fb234f8c7f627eff6e SHA-1: 97b355121db1d43bc7d9571cfaf68ec27cf88ead SHA-256: 2c473630456d8927469ed9edfb72027ef20f3f60168ad92efd87083875bd2464
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to compromised CMS upload storage, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/t3o3snicj0rvir2qu6fjs7q3nh/nisulewigevakid.pdf
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/zapisosolurigagofojorijuz.pdf
    • https://kujainspectors.com/candyticket/uploads/page_images/files/23504753841.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161330e6e74ae2---tujalopezukenopi.pdf
    • http://konikanarrowfab.com/ckfinder/userfiles/files/wepan.pdf
    • https://jurvamartin.com/userfiles/file/81402174114.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd3850e84d---85114107514.pdf
    • http://majstrissmt.eu/www-data/file/tifewajesobowame.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/161324a3d7d9d0---88537934986.pdf
    • http://wsp.pl/userfiles/file/wudojeneloduvetutag.pdf
    • https://datenglagi.com/contents/files/85980184405.pdf
    • https://ezastupitelstvo.sk/editor_uploads/system/files/puruzoji.pdf
    • https://lecormier-menuiserie.com/www/upload/files/godebewunivik.pdf
    • https://tyeetomsfishing.com/userfiles/file/bizofedenu.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/7pr0udr9glomo3194enrec5ir7/85596852652.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613319b1dbac0---gopobutisakidesisomividu.pdf
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/kajusozesokotuto.pdf
    • https://ikincielinmak.com/upload/ckfinder/files/fazalazasigofimupokuv.pdf
    • https://arrayamed.com/userfiles/file/9737693558.pdf
    • http://blesk-stroy.ru/userfiles/files/18585117410.pdf
    • http://sangiorgioautoservizi.com/userfiles/files/3896549249.pdf
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/28765953852.pdf
    • http://tomboy2.com/images/library/File/44624102800.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=paperearn+com+zip+lock
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d781.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD781 16792 bytes
font_01_sfnt_off0000ef93.bin
1142f49c40275fa67eebe28abe5d07924853d5fca802fc0202cea58498e096db
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 17564 bytes
font_02_sfnt_off00011d49.bin
3b7ee095ac0e7713ec2cd2ecc7dd60d4d73f2c523a559de290ee2b9d48a75a31
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D49 10420 bytes