Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d629ceb71a03175…

MALICIOUS

PDF

72.5 KB Created: 2020-12-09 11:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 50c16acc7c2cb0f149d14d3ce7fd144a SHA-1: 1cc5687983ac766e1f05fddbb85dc29281cef1d4 SHA-256: 0d629ceb71a03175d3bbe6aba5e0c27a8fb1b13a9c7fb557a655445697e3e192
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain metadata related to 'Descendants movie soundtrack' and 'wkhtmltopdf', suggesting a lure to disguise malicious links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/aws?utm_term=descendants+movie+soundtrack In PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/lizisiwaveliv-runoki-jixumubas.pdfIn PDF document text
    • https://xeseboda.weebly.com/uploads/1/3/4/3/134323550/buvup.pdfIn PDF document text
    • https://xuxulavadimuxa.weebly.com/uploads/1/3/4/2/134234789/galedenedelugelav.pdfIn PDF document text
    • https://gutawiwexuzoti.weebly.com/uploads/1/3/4/4/134477232/vamusu.pdfIn PDF document text
    • https://lukikezifad.weebly.com/uploads/1/3/4/7/134756415/ba346630.pdfIn PDF document text
    • https://verijijul.weebly.com/uploads/1/3/4/8/134861220/2529592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413590/normal_5fc3573409864.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5e7e4e98326c020819e3/1606377087472/gayatri_mantra_word_by_word_meaning_in_telugu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5599388c99b6d37c4f1c5/t/5fccd0c0e43f2b00a8a65978/1607258304565/94840460750.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a3f3d26ff1194f7eeae9/t/5fc574de6457125654f58115/1606776030371/ice_age_dinosaurs_rudy.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/41902367993.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc002e7e5c7695ca996b6a8/t/5fc5326fe18c5c478ea36195/1606759023554/13801127569.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/bodybuilding_workout_program.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD090 5056 bytes
SHA-256: 7150ca17af1e9d94cb4d26639fd81507107945645da5781757c9c8e329b1a5ce
font_01_sfnt_off0000e1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A8 11300 bytes
SHA-256: e671ed4c115b583a5aec7c0d59d254cde0589a4df1c2a802e7a663bcf308ec62
font_02_sfnt_off0001074d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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