Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4b0698e1e9f779…

MALICIOUS

PDF

94.9 KB Created: 2021-03-03 07:12:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f9f830f630ad129a5794f0a4fe8fcff1 SHA-1: 51117a2d318decd079adba880f9123cb61676a01 SHA-256: 6e4b0698e1e9f779b19ea4db48207954d065d63b77ad64ec6872e064b06e26b5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to phishing sites or download further malware. The document body, though heavily corrupted, contains text related to magazine subscriptions, aligning with a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://dugedepap.ru/123?utm_term=femina+tamil+magazine+online+subscription PDF link annotation
    • http://mufutekuson.getenjoyment.net/bifivetajuvebofapozevi.pdfIn PDF document text
    • https://cdn.sqhk.co/detazido/gdGjcji/miniature_golf_near_me_hours.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/2020.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/hj9gihd/geometry_dash_meltdown_all_songs_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459029/normal_5fc6b38f1573f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_602f77ac7d18a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427506/normal_5fcfeacd8bdfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470400/normal_6020d0b302935.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/EqieDtC/werewolf_wallpaper_hd_1080p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480387/normal_5fc897c0259c3.pdfIn PDF document text
    • https://fijuvosezo.weebly.com/uploads/1/3/4/0/134096395/2655708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382209/normal_60398180b581b.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/5359622.pdfIn PDF document text
    • https://muverope.weebly.com/uploads/1/3/0/7/130776407/mesila.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/Vqshahg/sound_editing_app_for_android.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/91733337618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490125/normal_6018803722b99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415291/normal_603cebce0e97e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413019/normal_5fc864a0cbb9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/viktor_frankl_stimulus_response.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A2 5400 bytes
SHA-256: 0aeedfb4b2f3c18e80a233a6bb230c4360e905405ba1f2c2868b00980efb09c8
font_01_sfnt_off000148ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148EE 10868 bytes
SHA-256: 5dfcfcee4ed369e54756dc416276dfcf5cf67aa39b4af1b5f3d497a0951b36eb

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