Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96646d5b028a2dd…

MALICIOUS

PDF

81.9 KB Created: 2021-08-18 17:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dbcc4ac509fc6ee28101007dbdf37f4f SHA-1: 5b7622d3f4db67901b68d8191dcb35b8175bf0db SHA-256: c96646d5b028a2ddb0c34f5a520fbbefe1d4cd7263b897fe976d0dc0a737070b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to external websites, some of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://pixomot.ru/uplcv?utm_term=how+to+download+popcorn+time+on+android+tv PDF link annotation
    • http://staceyasp.com/UserFiles/file/26704076067.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fff9338ef13---kegugamexar.pdfIn PDF document text
    • http://king-ber.com/UploadFiles/file/20210803101557329.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/2f101dd1dec82b1d62fc5cc40e67f7c0/fokimuterokoligeb.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/87103562086.pdfIn PDF document text
    • https://otterdisplay.com/userfiles/file/tugawegupoxuremivatifalek.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/vadutiseri.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/0cf1842bec612a42e43567cda4362b43/xefafeguvimosasidapunu.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/92044196504.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/nizuxomu.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/26834660706.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086bc88a7cff---6665498726.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160707a98df4ab---52192033654.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/c3epq3jjoo1sf21ibi1e9lsmpb/13973571626.pdfIn PDF document text
    • http://veivel.com/userfiles/file/sosilemifuposebukowalun.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/79980465124.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/7706477145.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/ruxufuko.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/30634301445.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/73371784880.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/31572462806.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/4465888897.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161123e75c17c2---46385287245.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b3d3c08cb---wugorufegukigali.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/3c087a85d44037192d010ec7832d8202/50574210735.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_off0000dea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA2 16404 bytes
SHA-256: c5a1d540820d40efa68f1840da7e5d347424f7369740c7e44f22e13ff8221792
font_01_sfnt_off000108ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C4 10648 bytes
SHA-256: 0e150f362fbba0c1c86e21e92dae657d54f91d70b380b223c6b77a7a41c81ff2