Malicious PDF — malware analysis report

Static analysis result for SHA-256 696ad1b565917793…

MALICIOUS

PDF

78.0 KB Created: 2021-09-13 05:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f5ee64e176f7e21c2f5d9b7e8e41808a SHA-1: 00b5c31185da76e017d32d049cf75934e1d6595a SHA-256: 696ad1b565917793fde48b834854b5ccaade1269a55b0080641e63d10f442542
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects to external URLs, such as the observed 'oniceh.ru', which are often used for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://oniceh.ru/uplcv?utm_term=apk+beat+maker PDF link annotation
    • http://geologocarmignani.com/userfiles/files/vuraladokuwaxa.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/lepab.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/paradesejil.pdfIn PDF document text
    • http://poliinc.com/upload/files/36053801285.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/vapofasabifux.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/wuzoduli.pdfIn PDF document text
    • http://rigosarchitects.gr/userfiles/file/lozegelimodo.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/wuzaropevobalazokad.pdfIn PDF document text
    • https://protraderin.com/userfiles/file/bigunibefexaxutu.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/zataxapatodowolobikulo.pdfIn PDF document text
    • https://enkaotomatikkapi.com/depo/sayfaresim/file/dudobugobitigiximafetosi.pdfIn PDF document text
    • https://asiapharma.la/files/files/57092698326.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/nedajesagigako.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/pojafilegevejiwiwuwasanag.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/76033567928.pdfIn PDF document text
    • https://vnmmalta.com/userfiles/file/81771524142.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/57023963444.pdfIn PDF document text
    • http://caramelitos.sk/files/sumepogob.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/xavimagiki.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/towutudadi.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210908080043.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_off0000c91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12C 19456 bytes
SHA-256: fb7ddd8e123923a9b0d8249e77235e9ea9a013a41b7932e6dad2780509df5c4f
font_02_sfnt_off000114e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E1 10096 bytes
SHA-256: 5f516393c258a26df886db7b41002c0c9e19a8f76939358cb3bdbd8d29c7f746

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