Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3fe871e1710ebd…

MALICIOUS

PDF

87.3 KB Created: 2021-08-21 03:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9667ecad08f8944a01d20fd72256be28 SHA-1: 8935d30e41481d43a449df1575312278655fa753 SHA-256: 2c3fe871e1710ebd633090b44bd9103b096f85349f5f15a1d7024f63ba550b88
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and a link farm pointing to disposable hosting, indicating a likely phishing or malware distribution attempt. The presence of embedded JavaScript, although not directly analyzed for malicious behavior in this report, further supports the malicious classification. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ehomerealestate.org/images/file/36360229385.pdf
    • http://kxnjl.com/userfiles/files/molanusimamulasinotudiguf.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a82936b95---82863313522.pdf
    • http://bijverhoeven.nl/uploads/files/27924944469.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083621d9ba43---73212297234.pdf
    • http://kondicionery-pushkino.ru/upload_picture/file/wovafeverafedejawamokofad.pdf
    • http://jimsclub.net/new/board/img_tinfo/file/20210808224248.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791b9f879dc---pamuzebewo.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca99887d8d---bavarolibovaxibukejazemog.pdf
    • https://securityguardsupply.org/php/uploads/file/24810397684.pdf
    • http://sincaremedicaltour.com/js/upload/mosiso.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d20d1a8af7---45614856679.pdf
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/27108909110.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/b0cddf4c0c430e44614d486b225aa04d/35584166824.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075f9af7b8bd---xobifusak.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608364b35dc48---73054061601.pdf
    • http://akcjonariusz.com/UserFiles/file/9451663371.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c315c9354f5---84516116951.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bb1e81173---tosafixedoviguwovanuge.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/k6p086magukjj9prss23k13gl0/33365147863.pdf
    • http://home-delighted.com/user_img/files/50071415813.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/40367773722.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/huue5tqtuvuocu6jtaj42bt4uq/96098121319.pdf
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/xifiwusoko.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=bodyweight+workout+pdf+download
    • 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_off0000f17d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF17D 16792 bytes
font_01_sfnt_off0001098f.bin
3d0c9305770d78defeb2afacc41bb07c71db61fcade874a51bdb08c4759eeb5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1098F 16860 bytes
font_02_sfnt_off00013597.bin
c4a3328e54d49e4804b652431d84a44f61f2fe4dd31f61c0067460bb2cc929e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x13597 11056 bytes