Malicious PDF — malware analysis report

Static analysis result for SHA-256 380c1aa267f72567…

MALICIOUS

PDF

81.2 KB Created: 2021-09-20 03:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee0e33a20e3c7b57e2744f5487e827dc SHA-1: 2cfd0b332be14ca2fdfe68f1fcf9aaf9948b849b SHA-256: 380c1aa267f725674da004d5974e54271dbdd392f4ed3cac5cd20115075a640b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to various domains, many of which are hosted on disposable or compromised hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm structure, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests these links point to compromised upload storage. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. These indicators suggest the document is designed to redirect users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://hycxchina.com/filespath/files/20210905194959.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab579aada4---81632766327.pdf
    • http://golfvillageonline.com/userfiles/file/79471290077.pdf
    • http://77owship.netsociality.com/upload/files/baponalesaz.pdf
    • http://vuoncotichdep.com/upload/files/10540223968.pdf
    • http://www.mediagrand.hu/data/editorfile/gasidixof.pdf
    • http://www.moyekolodin.com/files/wesolumutepixikadisejup.pdf
    • http://coaching-scolaire.net/userfiles/file/3612785026.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a34ed6fd5f---30191577383.pdf
    • http://somkuthyoptika.hu/editor_up/fetibezoxovofakafiperi.pdf
    • http://vipacademy.org/userfiles/file/97834464688.pdf
    • http://yuanhebiotech.com/upload/files/tanugemapilusisovijukaf.pdf
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/bofagaranokunotuxuxu.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef9b336868---sabovexufuv.pdf
    • https://tomas-music.com/contents/files/73228321965.pdf
    • https://munis-roquesalbes.cat/demo/vilalba/imatges/file/novijufizefomerogexato.pdf
    • http://grgct.com/ckfinder/userfiles/files/gamuwepafuluzebeda.pdf
    • http://xn--krmer-dnnebacke-1kb72b.de/files/file/3581736954.pdf
    • http://rtm-plus.com/ckfinder/userfiles/files/mupakofak.pdf
    • http://stavo-bazar.cz/userfiles/file/6184732765.pdf
    • http://ydyb.com/filespath/files/20210916121324.pdf
    • http://korealabels.com/ckfinder/userfiles/files/rivebesaritunivudad.pdf
    • http://garankuccu.com/upload/fckimagesfile/d0d3ebec83a8ad73a7d04c3ff73b046e.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=fonts+for+phonto+android
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/dbea2c7416691c2a5d6697886c485922/87925605101.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_off0000d61e.bin
276cf7da92c7bcc91bcd11bcd91da9b7ae47edbda6b706fef4c2f34ec3d9d741
pdf-font-stream PDF embedded font (sfnt) at offset 0xD61E 18928 bytes
font_01_sfnt_off00010803.bin
da1bd41fd573a150c2e338522b0dc059b642f49ec201d498c8648189591a33b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10803 10396 bytes
font_02_sfnt_off00011f6f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6F 16792 bytes