Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b6a0fdc09458ec…

MALICIOUS

PDF

71.2 KB Created: 2020-12-21 20:06:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a2d2d2f005a108734b4135129a3c338d SHA-1: 9d637bbcb3d7f10440b45f5db111b21753280e82 SHA-256: d4b6a0fdc09458ecd1d03032a7238e56bef50b2f98b74b0d7f0d1a24fc846aab
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=download+game+pc+counter+strike+2d In PDF document text
    • https://cdn-cms.f-static.net/uploads/4483345/normal_5fabba8e12fc9.pdfIn PDF document text
    • https://fuvekusegubo.weebly.com/uploads/1/3/4/7/134736786/lavexo.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/lalomovag_morakaw_rijiwugowax_semizifugig.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/528971.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/86aeaa3c-5431-423d-89b6-66adc4f0ee7e/96288584671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68488b2f-540f-469f-a74d-eb99f4c677cf/mark_klimek_notes_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd60626-3cad-44fc-bcb3-91cb604ac415/volazuroduzutexogufibape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8efe4ab0-53ba-4f96-93d6-a442183aec5b/mast_general_store_annex_boone_nc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfcd6f403f5353fd8f68b6/t/5fc1b92cbc819f1cf4191831/1606531375428/bloons_td_battles_hack_apk_ios.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d73311f6a419849eeda5/t/5fc52290145a8629dc557474/1606754961596/15297133277.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37bc8c30a162e0c62db62/t/5fc5a8102dd96f5918b0db13/1606789136860/42457374947.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/dulekodisuxa.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_off0000d857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD857 5680 bytes
SHA-256: f7e25726ef9ea1d211ff75d729c0d8f898233add617b877d43683780722b2643
font_01_sfnt_off0000ebb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB4 10616 bytes
SHA-256: ae704e0a678f77794032b83a8cddc3d31d6c8eb6e637546c72cb58b10cfb5814

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