Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c7ebcfd621a454…

MALICIOUS

PDF

70.2 KB Created: 2021-06-30 00:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c425324be28e91b5ce5095911daf42e1 SHA-1: d0bc495d29a796661b2c6e99ec1521f16efe5215 SHA-256: 00c7ebcfd621a454cbfc70340330a5585915ee38c30d1ac45bd711596b1896e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs and link farms, many pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=libelle+glider+for+sale
    • https://kltccompany.com/ckfinder/userfiles/files/63405254225.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c5992c5c4---29389858616.pdf
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/jamuga.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/b43c97406fbf46eedced08ed5894c07d/lagejixono.pdf
    • http://furniture83.com/upload/files/wodetududisubapirodofir.pdf
    • http://nowyhotelik.pl/userfiles/file/jezubitire.pdf
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/wosifiwomowizojuvev.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/d8002db19c5b27d2dfcb1c8338fc4d7b/veluweles.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901fa4f0cf5---38162327067.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ffbcc5dd4---14665354372.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608639df68006---48036215125.pdf
    • http://stavebnevyrobky.sk/www/upload/files/66342748648.pdf
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/vegobozilubotagegobefefun.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607443dc1f1b2---piseku.pdf
    • http://alemotta.com/resources/original/file/71365582468.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089bbf0c1044---968730325.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160872d215133a---4838817838.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/ca20b216003737ed3b6eefebc2953730/64627576104.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5c272714d26b14d20f03ea3123aba0b1/vuteriropizedug.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/o5psarg34g6oin86md80345p65/57062434420.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160806e5319e0b---senup.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/39144109657.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609e31a0b75b3---85579085847.pdf
    • 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_off0000b245.bin
39de4c64e331fadd1ad989a33ad416f93322b47e24b27d92754325053a2e5290
pdf-font-stream PDF embedded font (sfnt) at offset 0xB245 16244 bytes
font_01_sfnt_off0000dc34.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC34 16792 bytes
font_02_sfnt_off0000f44b.bin
3ed4fca2088e9ef8707476cf8cd466483ec2db5a56c118e6e476094753d8dd59
pdf-font-stream PDF embedded font (sfnt) at offset 0xF44B 10424 bytes