Malicious PDF — malware analysis report

Static analysis result for SHA-256 825622e1be777ade…

MALICIOUS

PDF

70.2 KB Created: 2020-12-25 19:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb0c885311e1a78b304c10aff502c9c1 SHA-1: c3f314c9a4c6db2d700fb5b94fc4d1c2ca00f5ea SHA-256: 825622e1be777ade3c008154fbf74897258caecf564755c08799a0b9581147bc
234 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to direct users to potentially harmful sites. The ML classifier also flagged this PDF with high confidence, suggesting malicious intent. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/strik?utm_term=is+wechat+going+to+be+banned+in+us
    • https://cdn.sqhk.co/kivuwutu/5gegjbd/36083371134.pdf
    • https://cdn.sqhk.co/pozuwifofub/ggdijr7/jereburepuxi.pdf
    • https://cdn.sqhk.co/bofogarabu/jgfjeTq/vamekupekevepam.pdf
    • https://jiwadurator.weebly.com/uploads/1/3/0/7/130776405/d357973b93c.pdf
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/nasujowatof.pdf
    • https://cdn.sqhk.co/kopizikob/SScBn3p/download_nes_emulator_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tufujifinobiro/caldera_triangular_baxi_manual.pdf
    • https://s3.amazonaws.com/wazagidonux/msu_denver_transcripts.pdf
    • https://s3.amazonaws.com/juvosi/english_grammar_worksheets_for_grade_1.pdf
    • https://s3.amazonaws.com/nitidadufetenu/58221568564.pdf
    • https://s3.amazonaws.com/xamibebulosaxug/customs_declaration_form_uk_cn22.pdf
    • https://s3.amazonaws.com/tabobujimo/castrol_edge_5w40.pdf
    • https://s3.amazonaws.com/wiremeresegikon/38257826600.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d775.bin
671f6ae1b413dbe05504b3428a474d507c2f0fcc460ed02776b256b2449b585b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD775 5244 bytes
font_01_sfnt_off0000e95d.bin
d6cbdb340ddba75079add048c95b6da7bfa3424cfefac4481fe90bb0fa30007b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE95D 10228 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.