Malicious PDF — malware analysis report

Static analysis result for SHA-256 596e29cb48019a54…

MALICIOUS

PDF

72.7 KB Created: 2021-08-28 02:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d98933470af856a0f71c5066a0849da SHA-1: fa798e667107b241fd3083e5b47c4aedc9023c72 SHA-256: 596e29cb48019a54f7d5b4d24759e23b7dc322898d5be9668ecf1a00a718920c
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs, several of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data, limiting direct analysis of the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://belloverde.net/emailer/file/28499298159.pdf
    • https://konteshamamotu.com/userfiles/file/5508952502.pdf
    • http://apexibd.com/uploads/fck_uploads/file/nexatukuji.pdf
    • http://vitalbafitnessclub.eu/userfiles/files/kafofabowesa.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16105dea483325---fikiragaz.pdf
    • http://banghetretunhien.com/media/ftp/file/torasikanakibofatidedure.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/83072bafcac212aeea012d35c47f1e41/telapog.pdf
    • http://massarentearchitettura.com/userfiles/files/pokezidupazivixuxi.pdf
    • http://yesilderecine.com/admin/editor_resim/file/vutudukaxorodaxe.pdf
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/binoxamedumi.pdf
    • https://exihomes.com/userfiles/files/72301339659.pdf
    • http://kaies.cn/upfiles/file/nasuruxilimuw.pdf
    • https://pharma-tools.eu/galeria/file/gulivikaweli.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/rklldo985u4qki7e4a26us2p04/mafatetamavetuj.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/625b283f1d76404d07a4d41931431342/48994297729.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/0p7dc7sdf2hubkm2qmci4eo3lf/16192563350.pdf
    • http://apismorava.eu/docs/86780536764.pdf
    • https://dudikom.pl/userfiles/file/zupudarupetowiniv.pdf
    • http://arisutour.com/ckupload/files/tajusoxitasisetitujusodez.pdf
    • http://studiocalcinoni.com/userfiles/files/64227496276.pdf
    • http://kaies.cn/upfiles/file/43726551635.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b70cb4b49---58044389610.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/e3697f0087a46b13b7975dd87b75a373/8327246806.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=produces+the+most+organic+water+pollution
    • 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_off0000bbad.bin
f2e09856e87fae49a38f1ec8193c136700a5f42fceb5998fc0bb7cb618cc19ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBAD 15532 bytes
font_01_sfnt_off0000e339.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE339 16792 bytes
font_02_sfnt_off0000fb50.bin
85b79e61bb538cad110795d0f5cfe6bed7d80d43eeedc6b49696a787938b3132
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB50 11148 bytes