Malicious PDF — malware analysis report

Static analysis result for SHA-256 04676fb362ca8166…

MALICIOUS

PDF

71.2 KB Created: 2021-09-27 14:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: b80794713e65968e4f112850e30509c3 SHA-1: eb9ac809a94b010c38386c307b4f0bb175e0fcb1 SHA-256: 04676fb362ca8166b6f6745fa72c54a54b2f592580a08e3a907a58947f3652e8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=mirzapur+series+on+which+app PDF link annotation
    • https://sofupingame.com/calisma2/files/uploads/88239231461.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ca6249e112---13443942190.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/78589792726.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/kenidijuvuginedurufabi.pdfIn PDF document text
    • http://maulich.vn/attachment/files/famiwiwoguzivedil.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/32958213504.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/41341499180.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/zevolizamixavas.pdfIn PDF document text
    • http://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/xesonosij.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/3216067398.pdfIn PDF document text
    • http://rensind.com/upfolder/e/files/20210925002454.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/71401654740.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/lomugomajonesa.pdfIn PDF document text
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/98945428060.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/wozarulolada.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/bifazadowedugifolaguna.pdfIn PDF document text
    • http://ip-malkov.ru/uploads/files/90546165132.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/lolanedetirajaluj.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/jikoxasinasubaleb.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210910004624.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/7fe4975449af9a50fa70447290622067/biligorupexexadasake.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/18741917763.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/31405714216.pdfIn PDF document text
    • http://smm-mm.com/uploads/news_file/rilisenezavozojix.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_off0000b1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1DB 10568 bytes
SHA-256: d337aabbb71309ccf2b1039208ee601104620fc5603ccc24dd0f5ba392e65551
font_01_sfnt_off0000ca00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA00 17724 bytes
SHA-256: 1ee3cb6f7a50917a043a92cfb01a08b7e732d1fb3a472ef5fb5aa994029b27ee
font_02_sfnt_off0000f70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1