Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5f0b2d3cf95970…

MALICIOUS

PDF

65.1 KB Created: 2020-12-19 06:07:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 93d0b88576235eebe66f831bad8f1294 SHA-1: b4b786f4699d562c05ad21ce395f038a5ed602ed SHA-256: bb5f0b2d3cf95970f358ed3ae4ff33ffd6e73bbcf1c9c05bbfe735cb07be37b0
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-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/strik?utm_term=cluster+sampling+example+questions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f87133fb58b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383807/normal_5f8deb7a57384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_5fa17ae581b5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388611/normal_5faa7ee02fc64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_5f99a3c64617a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467945/normal_5fb6a4c2abd28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_5fbc991d00307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425217/normal_5fb8bfef08869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f87283f56906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405907/normal_5fa6bca2265f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468871/normal_5fd2eda209281.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/9f9c513b-d950-48c5-85e7-1f30cf40aca2/nofumad.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/gta_5_apk__obb_zip_file_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f019a3f9-9f6e-4183-96d4-286caa2dbcec/harmonia_e_improvisao_nico_assumpo.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_off0000c4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BF 5240 bytes
SHA-256: 7700bfb10f606be63aa16b5930d451b858229c8367c8b5889294dabe4eb98f17
font_01_sfnt_off0000d675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD675 9736 bytes
SHA-256: 71dbf43199b1e71ce57b4c180472b7bb028757ca31698c20eaf809ee68baac94

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