Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6787673832f6b4…

MALICIOUS

PDF

101.7 KB Created: 2021-06-27 03:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4529e2a82eb789b9ffa845695cdec304 SHA-1: 39feece756a9abbae3b88fde7e3f0f653f958e7f SHA-256: bc6787673832f6b4c8512a36fd177608c052c255d25212e024bab0d5fa631347
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the PDF structure indicate it's likely part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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 https://cructi.ru/uplcv?utm_term=participative+decision+making+examples PDF link annotation
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/00e8914ce2470c9e8cf75f2d48ba41da/74691217256.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c44fd7b75da---51335110838.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/0m1hmf2i52l7kvssh4hos0bgoi/mapozipawagimawipufa.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/vusogudolixamagikizu.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070411a3c65e---mekebiwarotepagugipagoji.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863e720e6e2---gemibojuxalofafuxipidif.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/6dc62ecc98839105927b1266aa2f099c/tuwugu.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/83828915768.pdfIn PDF document text
    • http://khanaphatgroup.com/UserFiles/file/taxurirofelinogowefafam.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/kigikuzilaz.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4d379b9ef---57503144934.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/gsoeijgva5ls30a393s6f0b985/16978809136.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160814b75d8a3c---40884566686.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/69678725115.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/bc76e1e4feb6906ac3ed2f4b67e0eac8/87885123530.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce899ddeec---44675690270.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609366d7b20b5---vopifixojabufimo.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/npgd0k8nqlu32sdbls3911vkl0/89213317395.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a90338c3fc---88419415333.pdfIn PDF document text
    • http://childhood-matters.com/clients/49507/File/1178899.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd07331ed3---fekofoz.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/xetifujijaxalog.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf0e491325---vugarugudojemuvomizefiji.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/98330574619.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/wubab.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D1 18220 bytes
SHA-256: adf8d0b1c505cccf59be4f00a0e3ecb9c2b060d2e695a89ac14329b64ff3e725
font_01_sfnt_off00015775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15775 11120 bytes
SHA-256: be397b9b26427cea2d3841987f1c05edff86f2c06384c7c3486d8fe6bd6b81b7
font_02_sfnt_off00017141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17141 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1