Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef7b45c52c4de32…

MALICIOUS

PDF

66.9 KB Created: 2020-12-19 18:10:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 477037073eaccb0f62c60ebe12ef53d8 SHA-1: 020898f6c05bb18fac2b3a1a6c7cbf5162718c5d SHA-256: 7ef7b45c52c4de32ce23fdea1ad5d2bc0c8abe27ffe8e6564526a041c7c250ad
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 0.9998

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://gettraff.ru/aws?utm_term=basketball+game+images In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5f931c2a39069.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480591/normal_5fcf5808b4ac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421640/normal_5fdb1987b8fe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5f88bd8b35aa8.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/b77912c9-95d4-42d3-8ad2-19e9783b7d8d/topujikakakubevi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79396d2523e4b70c2aa72/t/5fcd3799e43f2b00a8b37bb6/1607284635344/lemerugo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcb8f07619a53deeff8ff0/t/5fdcd35000a261771a7442ce/1608307543011/81870341989.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd46f08715ea0dc9cdbd2a/t/5fdda522459323513bbb342a/1608361254353/texas_coastal_fly_fishing_guides.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc80e9ff99f865bfec01c9/t/5fdd01f52641315525330b8d/1608319478416/free_lagu_binks_no_sake.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/33558218525.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/jozulima.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/oculus_quest_3d_blu_ray.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_off0000c8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FF 5160 bytes
SHA-256: 16abd76db203039e1f8a25d22158a7f505ff020fd487ce9277fb4bb2f63ef8b6
font_01_sfnt_off0000da86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA86 10612 bytes
SHA-256: ab31fea45b464a0c3ccbbe380c2de72bca5eea87fec0eb107295150d1f5ae646

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