Malicious PDF — malware analysis report

Static analysis result for SHA-256 2362134f55268f43…

MALICIOUS

PDF

68.0 KB Created: 2021-09-28 00:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c980059fe606b66f353ff8cd1330781c SHA-1: a2691c3d1b87cb9c7e496fa9297b22a798006410 SHA-256: 2362134f55268f43f6026fdce846030b80e7809e15ca09cc0a9645f17d8b064e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to potentially malicious or unknown domains, suggesting it functions as a link farm or a distribution point for further malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports its role in directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 5

  • 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.
  • 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://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/5a5aa5a536754c139f814b0b3610340a/23021043513.pdf In PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/xusozo.pdfIn PDF document text
    • http://precisao.net/files/files/gekusazizit.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/78137974327.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/febox.pdfIn PDF document text
    • http://canoeing.by/pics/files/loweligajiwe.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/mapasi.pdfIn PDF document text
    • http://jngf.cn/files/file/37253621039.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/piwomubagoguse.pdfIn PDF document text
    • http://nationalherbo.com/userfiles/file/jozelibagasakifonenijeji.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/wovajafegutobaka.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/49577002845.pdfIn PDF document text
    • https://turbooto.vn/upload/files/53066142470.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/55399265989.pdfIn PDF document text
    • https://glozor.com/userfiles/file/84410273927.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133460fb48ba---4354102252.pdfIn PDF document text
    • http://vitccorp.com/uploads/userfiles/file/mefofevevisilasa.pdfIn PDF document text
    • http://annabarons.lv/files/files/nigufuzanevojupexawisux.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud/files/wobitotewexuponodozaninod.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/15701791678.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/tuboxazakipo.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/60041174771.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=snapseed+apk+new+version+downloadPDF link annotation
    • 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_off0000ace6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACE6 15184 bytes
SHA-256: 363404145d2071681756861c9aa34b805342a829758796fd510129ec5735b8c4
font_01_sfnt_off0000d26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26A 10608 bytes
SHA-256: 9d5951fc28b6180dc6b548ef42fcf0d4f98f5b7f0a690f1310e60a3a5cb0c155
font_02_sfnt_off0000eac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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