Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e2c21c290c0034…

MALICIOUS

PDF

75.6 KB Created: 2020-12-18 00:53:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 752df75a55b3c4a1a59aacd2a099c22b SHA-1: 2182e4a4d4f96dbbd57e00307fc220c777119569 SHA-256: 84e2c21c290c003435f2d3a66c919fd4e52457511b4fc68c524d1b0103ddb32a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ggtraff.ru, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Chemquest 39 answers'. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://ggtraff.ru/strik?utm_term=chemquest+39+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5fa223ab0cdfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366633/normal_5fcdb8ff53cef.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/5fc2b7966b97992eb567a9c2/t/5fc86a127ff5a343ebf4d95d/1606969874980/62427486735.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53768bf71053ccb2bf618/t/5fd1aa8ead61ab583188180d/1607576207861/16766149889.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d446ab79f442f2293e00/t/5fc3231d61e25426e19ec8a9/1606624030243/16067437352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65244880-8148-4833-bd81-8d24ea344061/verizon_esim_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/malakibo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc115bd5e8e827d428ee316/t/5fc2fe733570fb44d1662a38/1606614643279/uninstall_my.com_game_center.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d054d32fb7060d0dc3b9/t/5fd61963ab1a676c72855ec5/1607866726202/xaseweja.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/the_masorah_of_biblia_hebraica_stuttgartensia.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_off0000eaaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAF 5336 bytes
SHA-256: a733e2c556d9a46271b2d2a52c7f289951ae9e6a6bd52fba9405e129e4b2ff98
font_01_sfnt_off0000fcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB3 11112 bytes
SHA-256: 3f3c388393e1765fbc575a74731f4abca90a8dad0cdd0295f04c6cd5d94699fc

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