Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a44a8c64a1fcf1…

MALICIOUS

PDF

87.9 KB Created: 2020-12-24 13:53:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 643115834f99dc54695ed488bf912446 SHA-1: 73e66ee8188227e3c6cb5e4e306534075ddaf172 SHA-256: 02a44a8c64a1fcf1ee94b447ef2265266d8c70b9c165c56727bf2025fa0bd459
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the PDF structure suggest an attempt to redirect users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffine.ru/aws?utm_term=akuntansi+sebagai+bahasa+bisnis+pdf In PDF document text
    • https://cdn.sqhk.co/kibizatududo/jcgdgjS/rafifiwuvozadujeluzax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5fc1eea092a88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_5fd2bfab202dd.pdfIn PDF document text
    • https://lojigimab.weebly.com/uploads/1/3/0/8/130814508/fogikulenonuw.pdfIn PDF document text
    • https://cdn.sqhk.co/taduzotul/etaVtjd/download_fonts_on_iphone_for_cricut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426260/normal_5faacaa04cba4.pdfIn PDF document text
    • https://zemabata.weebly.com/uploads/1/3/4/6/134677216/jubetabukolatad.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/ggO3fVo/5573365575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450036/normal_5fbc788018cfa.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://s3.amazonaws.com/wenobagupexekap/gotovinikimifabedajal.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/ibm_serverguide_windows_server_2008.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/auto_lotto_processor_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/ielts_speaking_assessment_criteria.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_off0001102e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102E 5140 bytes
SHA-256: 48ac56d3d91ceb7d4ef0c88234ffafe2bd40b5c72c2672a5c15de2de4075e190
font_01_sfnt_off0001219b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219B 10200 bytes
SHA-256: b0b599e2d4128cce66130471b5f32aee5e751c8959e3c5b7cc7c27536f0c3b01
font_02_sfnt_off00014483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14483 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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