Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0c84c56654cc6a…

MALICIOUS

PDF

81.2 KB Created: 2021-07-03 02:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d183588f1fdc47ccfe422c77da16a99 SHA-1: 01a527581ed8d866fb7b673c15a138d5baeb247f SHA-256: cc0c84c56654cc6a31ecaf17f065cdfd85ae93a370f2f0f5319f80362cef49ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to various websites, some hosted on compromised CMS uploads. The presence of these links suggests the document is intended to redirect users to potentially harmful content, such as phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://budoprojekt.eu/obrazy/file/damonarozavodumazafagezok.pdf
    • https://ludifrance.fr/userfiles/file/98618675315.pdf
    • http://tomnhenryanderson.com/clients/8/8a/8a1068334c160bb49438aafe8043afff/File/18005275422.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/b033b915facf79a1a53e76933f1e9ba0/55992506149.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/f45b7203e8de72b714f2b0b7249e834e/vugudekavutisezokoxuluzux.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/91749518804.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/b25f7e0b5b19fb5de701953f8f0a86fc/takodojebetu.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a6688488c---51023615353.pdf
    • http://wych123.com/upload/files/74159245358.pdf
    • https://pensiuneavalentina.ro/app/webroot/file/26649911221.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea8682e45c---giwexad.pdf
    • http://reguitti-engineering.it/userfiles/files/91330147585.pdf
    • http://i-daa-wl.de/userfiles/zowasivaxid.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/15m50avc6l8lf0lnjgnofoou6l/masadofan.pdf
    • http://chronicles.ae/userfiles/files/23482316607.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/eb74c7ba29067df0e8a3142ec261955a/11706721258.pdf
    • http://barcelonasixtytwo.com/userfiles/file/60063401008.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d6685b98972---31917581839.pdf
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/41355170807.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de61e06291---xaloporerujadogu.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895fd5e5c2b---41613794472.pdf
    • https://adtw1.com/ckfinder/userfiles/files/nulenorakudotim.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/hs4dv15e3nqu0tjuqjdgvpgu52/13273808290.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=vidmate+android+hd
    • 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_off0000cf94.bin
2779b766b870f3ef9c2ba86a29c0b97badaf7d51bab1a6cc5701203047803228
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF94 27816 bytes
font_01_sfnt_off00010719.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10719 16792 bytes
font_02_sfnt_off00011f30.bin
ef9307dee5d6815cadad36d3f99c2ff5c796b3542c50fc53198079a0554571d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F30 10268 bytes