Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c4269f82f58a51…

MALICIOUS

PDF

72.6 KB Created: 2021-09-05 06:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0066b475df22ebe64a7b2ecbc48d652f SHA-1: ad87b162a730bdf66746c33d61472ea7aa6ba627 SHA-256: 77c4269f82f58a519ed4c8a035d8876bbb373d4af96709a055499790df5e02c5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=epson+emp-tw1000+manual PDF link annotation
    • http://dush-kz.ru/uploads/fck/file/gisixatezenapinoguzekune.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/lesozapulubopikarow.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ce4c93bbb---58856013407.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161070790305ad---duzagi.pdfIn PDF document text
    • https://roc.mn/uploads/files/bekonitozaroxiguwogefi.pdfIn PDF document text
    • https://brs.jo/userfiles/files/fakitatume.pdfIn PDF document text
    • https://www.thic.net/plugin/ce1/ckfinder/userfiles/files/zexivoxulojodipeviseruvo.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6bc34f541---6186543535.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/deviwajenemerevofivuronid.pdfIn PDF document text
    • https://stw-nowogard.pl/download/file/jopadepenasowifewigew.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/soxiw.pdfIn PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/tupapuxojovet.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/5fd280767a8bbc021c5dcca50d18be2b/jazituguv.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/tivadowowosidulituxaje.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed449eb810---zijoxoxewe.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/purujuwenifawabaritet.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/ra5sn7tp8fsbpttfuvr5psbv94/mimixabosed.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/93023889020.pdfIn PDF document text
    • http://zatacorp.com/upload/files/pedenun.pdfIn PDF document text
    • http://architettoannalisatinelli.it/userfiles/files/28855646972.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/zoganalijaremizegesaj.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1611796027bcac---94352082911.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021781248111344.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/93772360403.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/katogidodokela.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/fusuvugixarokizud.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_off0000b97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB97E 16788 bytes
SHA-256: 04eec093f429a0ca370fb129cf39da11c0062e9d9482cd16addb6f28bb2ad54f
font_01_sfnt_off0000e469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC80 10596 bytes
SHA-256: 7bdf66bd0977f380fb2fb98066b4aee8cdb81e4a0e276a37a1b43c7eee6d4911

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