Malicious PDF — malware analysis report

Static analysis result for SHA-256 732f304afe3c82f8…

MALICIOUS

PDF

73.7 KB Created: 2021-01-16 16:06:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9c217beeacae3d6f9299ff1129bbd365 SHA-1: c933c8084cb18c6c880d3a0d4155c49534adb2c0 SHA-256: 732f304afe3c82f8e1816e50201358097d42edc31206585b0b2e29ccc1815b60
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain metadata related to the file's creation and potentially a lure. The presence of embedded links suggests an attempt to redirect the user to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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/wb?keyword=riptide%20speed%20boats%20racing%20youtube In PDF document text
    • https://site-1221949.mozfiles.com/files/1221949/lab_report_on_calorimetry.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370080/normal_5fc5316069fbe.pdfIn PDF document text
    • https://site-1173682.mozfiles.com/files/1173682/zerifedabudisuk.pdfIn PDF document text
    • https://site-1176409.mozfiles.com/files/1176409/bavuzuxivis.pdfIn PDF document text
    • https://site-1178066.mozfiles.com/files/1178066/84909893026.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374953/normal_5ffce4dc17176.pdfIn PDF document text
    • https://site-1168078.mozfiles.com/files/1168078/wazekoxuxipiradule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479213/normal_5fe938a0951cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_5f97b4d38d84f.pdfIn PDF document text
    • https://site-1200133.mozfiles.com/files/1200133/nekoxitosofodexiwugavamaf.pdfIn PDF document text
    • https://site-1168274.mozfiles.com/files/1168274/14142614719.pdfIn PDF document text
    • https://site-1211564.mozfiles.com/files/1211564/dulilamita.pdfIn PDF document text
    • https://site-1172512.mozfiles.com/files/1172512/generations_the_legacy_2020.pdfIn PDF document text
    • https://site-1232713.mozfiles.com/files/1232713/mazuxu.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
    • 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_off0000d6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C7 5340 bytes
SHA-256: 72e3c55927f2c44de9735bc27e62acd13ec107752d4de4126678f7890640e1f3
font_01_sfnt_off0000e900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE900 10128 bytes
SHA-256: 780fe9a62fb33730c80400edaec0faca8d351608d48efbe0946a54ccbcefe8fc
font_02_sfnt_off00010bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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