Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04c08af1886136c…

MALICIOUS

PDF

82.3 KB Created: 2021-09-16 06:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a58522ebb9a1067a4920562afec1501d SHA-1: e90911aecbbfc4cc7b0fafb3ceb43f3e84295f6e SHA-256: b04c08af1886136cbfa29bf2334764a520ff62b46ce4b28c74722d129e394f08
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://coretry.ru/uplcv?utm_term=mcpe+for+free+android PDF link annotation
    • https://pmms-online.com/assets/file/mitufadalidukizewaxuvedo.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/kilelufudapopog.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/pinexunokiwaviwawizaveke.pdfIn PDF document text
    • http://cocoon-source-harmonie.fr/public/file/jerumepilezimoxu.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/31731075224.pdfIn PDF document text
    • https://windsbs.biz/files/file/71365020629.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/66801742396.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/97093957615.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/30162072845.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614219b3a7543---wikeladixebivutokalazare.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/86865211415.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/leromutixitoxunexodetoj.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/1lpct72qu89aam76iu3iju49sp/bofatixijujuvovefodex.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/forebisuba.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/89395759161.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/pofubewuzu.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/puwijadagujivuzowalo.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/lexilokugexasugilazof.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/fasekuduxizumujerewifole.pdfIn PDF document text
    • http://corse.annuaire-regional.com/ckfinder/userfiles/files/duvulumukeribavuvulerarel.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/xapenovunekukavonifogunoz.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__613ACC82A1BF7.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_off0000dcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D3 18544 bytes
SHA-256: 54fe814e0300c64fca4b32bab94a1e8cbb0ac58ce04630fe244cf7b46a4c48fd
font_02_sfnt_off000124fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FA 10292 bytes
SHA-256: f388a956e1fc06acd1d015ec972a1847d9c4422ae5801c0c51cc4dd2ed14716e

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