Malicious PDF — malware analysis report

Static analysis result for SHA-256 4294c941b7acee3b…

MALICIOUS

PDF

71.6 KB Created: 2020-12-23 10:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 93c0afdba961033f980ef2d741a929fe SHA-1: c383c85f1b4cee76cef20255dc3a8d021be8f1c6 SHA-256: 4294c941b7acee3be686c750bc9000b93bc8211d3c923b0b72a50dc3ec9e4f5c
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://traffmen.ru/strik?utm_term=smartness+test+questions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_5fbf000039c46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390097/normal_5f90e54995c54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450350/normal_5fabc708a04e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418778/normal_5f9c5f1fa3086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f91954686e40.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/dazifozixawus/41101162001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4149c2f-b6ff-4801-bcd1-3d03c432eb09/samsung_gear_360_app_apk_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc574671c8c74131450b5d2/t/5fcd875dc00f007cea003a9c/1607305054377/feludeza.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/fifog.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/bavumonukobufobilano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44427445-794b-443c-84b6-e1a631ddc239/tezamanavokubejar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4270ea-56dc-4016-99ee-b45fcae0d0bc/bodarepawoguw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf246b2dcd53187f20af33/t/5fdf37445809ae34340b4dd1/1608464197028/91402676209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf777cf5-b99e-472f-8e89-b7e8e5d9355d/large_gift_bags_dollar_tree.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/dumasosukeburilaf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b1f5bdb33045eee2efc6/t/5fc889f3f97c193540f2d6f5/1606978036304/98113651589.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c36dbda9c57a97df81cf/t/5fca5b09d9b89011df94fdd4/1607097098561/modern_beach_house_minecraft_pe_download.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_off0000db8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8F 5028 bytes
SHA-256: bad0ca3cb4d1c3918535735a7800e6101e9c7eddca1824e2b4d0721ff9aae2ec
font_01_sfnt_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 10892 bytes
SHA-256: 57a7999810b197475bff848b862fb9e4e652c956f8fcdc1cfe36b3562067fee7

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