Malicious PDF — malware analysis report

Static analysis result for SHA-256 e057c671ba86fc53…

MALICIOUS

PDF

70.7 KB Created: 2021-09-21 01:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c24b85d13b07d1646152811b7e26150a SHA-1: 4d28335edc7af52733cdbcec04050b749a0a96d0 SHA-256: e057c671ba86fc530c73c2f83eec67fd2783917942d3de8e19b9b5d1d8028d38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further supports the attack pattern of distributing malicious content through seemingly legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://laborke.ru/uplcv?utm_term=temple+of+boom+unblocked
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/4421ae906037d1c7b3fd2d1020784aad/81729463392.pdf
    • https://vinniescustoms.com/userfiles/files/65081552286.pdf
    • http://jawarakreasi.com/file/2385794020.pdf
    • http://shopcode.ru/uploads/file/23150846832.pdf
    • http://jyjwqj.com/uploadfile/file///2021090200523746.pdf
    • https://stpm-sa.com/userfiles/file/mesivaforazeni.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4676c9b36---nubizigaluw.pdf
    • http://togclick.com/media/userFckfiles/file/lijetuw.pdf
    • http://millecolori.it/images/file/jotig.pdf
    • http://pphu-joanna.pl/fckpliki/file/xomonijus.pdf
    • http://qamsar.org/userfiles/files/geverivobeniluwe.pdf
    • https://darshanam.com/ckfinder/userfiles/files/89288977820.pdf
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16148f79e66b07---56563102055.pdf
    • http://seasonmediagroup.com/pic/file/ganusupezevejowibikuto.pdf
    • http://braghieriarchitettura.com/userfiles/files/dimev.pdf
    • http://emeat.ru/var/files/godemukifutevamumav.pdf
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/78008392527.pdf
    • http://afghansolar.com/userfiles/file/49526787436.pdf
    • http://ministryofrum.com/memlogos/file/wizotugaxojaxewol.pdf
    • https://brianhigbielaw.com/UserFiles/file/36652173452.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/favubebumazafegejewa.pdf
    • http://ceramicaartisticamarsalese.it/userfiles/files/koxolukuzixozipu.pdf
    • http://marmaraisg.com/images_upload/files/48485915388.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613948cd14f25---tolubafomilikujalor.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_off0000b6ba.bin
d81d83a503c3ab7facf11839585b217ab7a1840084ead267ef06cc47de3e42a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6BA 15752 bytes
font_01_sfnt_off0000de23.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE23 16792 bytes
font_02_sfnt_off0000f63a.bin
2e9f5d581a70d5c4f57ea82276d4fc02e22c4f9badede8ecbe9ffff5756213a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF63A 10456 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.