Malicious PDF — malware analysis report

Static analysis result for SHA-256 d492bad372d85f32…

MALICIOUS

PDF

74.8 KB Created: 2021-01-06 13:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9dd60b75715ae4e4b1f3eb0667f8c044 SHA-1: 6117d12f478756fb8863c31593df1e941ed095d7 SHA-256: d492bad372d85f32ae52f203d551dddc17b8be8596ef06da7406e8302b2e7431
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded content, though heavily obfuscated, likely serves as a lure to encourage clicking the malicious URL.

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://ggtraff.ru/123?utm_term=vizio+sb4051-d5+smartcast+40 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5ff42f5c142e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5f913caa33f68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480582/normal_5fc58458d3259.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/Ljcjcgc/download_boomerang_video_from_instagram.pdfIn PDF document text
    • https://lidanoliki.weebly.com/uploads/1/3/1/3/131380598/3713236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380392/normal_5fda8da67ac9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409801/normal_5fa5d1716e6bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414331/normal_5ff3ce57b9042.pdfIn PDF document text
    • https://cdn.sqhk.co/gajerivab/iYifaTV/musynx_ps4_update.pdfIn PDF document text
    • https://revawovaweku.weebly.com/uploads/1/3/4/0/134013066/2410207.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/livanavor-juwanise-wexasaso-darebilime.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/8a7391f3-b173-4688-8081-9493ea8ae620/chrome_hearts_jewelry_prices.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_off0000e6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B8 5644 bytes
SHA-256: bf2a3d9ecc995216facfab981d615cfe626d476cd9455cb7b9969988325db4a3
font_01_sfnt_off0000f9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F4 10704 bytes
SHA-256: 3d429f1d05c99f19408549c6ec9a66cb6a766f2b8a33d666731abe588e2d6db6