Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d4cc7e209cd2e4…

MALICIOUS

PDF

74.0 KB Created: 2021-02-26 18:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: acbd13ee4f556fa1a157673509190aab SHA-1: a97f42aca587be3465111fd5f32c3400c858bef3 SHA-256: e5d4cc7e209cd2e4be54b37878af887bf13138e710027c3484dba9f9965593a2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=blandy+experimental+farm+jobs'. This URL is likely used to phish for user credentials or deliver a secondary payload. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector is sufficient to infer a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wix?keyword=blandy+experimental+farm+jobs In PDF document text
    • https://cdn.sqhk.co/nimuxugemu/jOgeehb/44969708595.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471710/normal_6002e04a797ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414495/normal_5fd08b5dd73fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455406/normal_5fd833c902807.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/dghgLt7/78002958502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481552/normal_60057b71748ff.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/ijYjgP2/97250415678.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/3hihg1v/11912819152.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/ijaibgg/2_player_games_ps4_racing.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/wjgB0xf/folob.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/jjBvChb/9342285245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445534/normal_602660b241a61.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/sony_hdr-cx160_as_webcam.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/fojaxexino/76930146798.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_off0000e379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE379 5624 bytes
SHA-256: 6fcc8b03a7c68a9905ba53b1f877157ad7e48d0f94f599b22e6597bf9c6985be
font_01_sfnt_off0000f692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF692 11080 bytes
SHA-256: 8a48c9b444b8286df6e4e93c83eda55e3f78ff6a5df22171e8e26d25ff1c93d2

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