Malicious PDF — malware analysis report

Static analysis result for SHA-256 372e06c0f4dfd2e5…

MALICIOUS

PDF

119.7 KB Created: 2020-12-10 17:13:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0cf2ac44c8a7d247ce09e27b846d0f8f SHA-1: 2f94eef955d95e0781d7aec102f40c3e2ceb4ed2 SHA-256: 372e06c0f4dfd2e515b009427ca69a4928caa40a5795f9e08126e3920b69b943
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Chernobyl movie series' which likely serves as a lure. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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://gettraff.ru/aws?utm_term=chernobyl+movie+series In PDF document text
    • https://static.s123-cdn-static.com/uploads/4380392/normal_5fc76de5e553b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5fad8030d36fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426690/normal_5fb6c4c0b59ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1015360f2895dc1e86a3c/t/5fc360303f75b166433f8296/1606639667573/de_broglie_equation_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/escambia_county_clerk_of_court_child_support.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf63a07acac6192ab8d834/1606378400457/westwood_middle_school_science_fair_packet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc592c8239b07229150fbb5/t/5fc9aaf3be6684539de6d60d/1607052019295/xewudawewodusejuguziw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d9d540f1034a5ca886a6/t/5fcb15c621c0486e918ed9bd/1607144903729/sasusosonitiwopij.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc141b28ef7301f8b131a8a/t/5fc478b718e72e5fdb67d931/1606711479917/91483918820.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d45c6609fd0ee7aaa180/t/5fd0c6edc0a29916a5737547/1607517934858/rakaxeminun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce00a12ee13227da658364/t/5fcf9c3b01eaf4591e30d200/1607441468621/real_football_2020_mod_apk_data_obb.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_off000184f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184F0 3120 bytes
SHA-256: 1ad02b79c7091a558633aca35b79c18c4801c8f97407e2d39b41a6bac3159f63
font_01_sfnt_off00019023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19023 4920 bytes
SHA-256: fe688063842f5c743082d42a410457b21a681422529c0cc8662cd17df5eeabbc
font_02_sfnt_off0001a0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0B9 16676 bytes
SHA-256: bfcb6727713da2e136716700a618ec0eba479688f695e4325a8c8d1fedc85b51

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