Malicious PDF — malware analysis report

Static analysis result for SHA-256 c309feeded2eb22d…

MALICIOUS

PDF

81.6 KB Created: 2021-01-16 10:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 04409e6a7dc136253ff746f6f5d6e6e5 SHA-1: d34694d5e68605d88ea3b99ef85afac1ea5d95d0 SHA-256: c309feeded2eb22dd4f4bfbe6da3f2a0bfbd52d93d67f71116742af9eaaa2593
154 Risk Score

Malware Insights

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

The file is a PDF that contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, likely disguised as a document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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/123?utm_term=abbreviation+for+manual+vacuum+aspiration In PDF document text
    • https://site-1176438.mozfiles.com/files/1176438/siemens_busbar_protection_relay_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/pabukerofo/3Jv5jeB/3658371035.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/hgfdjdu/25223862615.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/cwxha2R/86088442998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5fb775d397b8f.pdfIn PDF document text
    • https://cdn.sqhk.co/tigepukeri/XXwuIF9/baldi_s_basics_birthday_party_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vifutetax/Rqihaif/nozewarajora.pdfIn PDF document text
    • https://cdn.sqhk.co/tovasodoj/ijsjh0a/mtn_pulse_data_plan_night.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/sezoposidelalikutoredalup.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/anarkali_malayalam_full_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/88264516790.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/xunoferenovumabi.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/59521485494.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_off0000fce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE3 5352 bytes
SHA-256: 9058a9840ed5cd4124aed41ba334b5a9f9dc247ca482e4bfe25bb5148030fdb5
font_01_sfnt_off00010f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0A 12860 bytes
SHA-256: 993dd94702830d6c041d218238bc33b45b0e8a44d9455683e5afafe9adeff985

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