Malicious PDF — malware analysis report

Static analysis result for SHA-256 5952d1f70cf552a4…

MALICIOUS

PDF

115.0 KB Created: 2020-12-30 23:37:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9a3ec88d4640b88ecb49c1a722bb15d SHA-1: 1af151220b9fd338b2d56889cb4f0c84dcc04550 SHA-256: 5952d1f70cf552a43ce00fa1f7017301460cbcd4bd22816d239051e90ad99e63
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link farm and a redirector to malicious infrastructure, indicating a phishing or scam attempt. The presence of a 'download button' lure further supports this. ClamAV detection and ML classification confirm the malicious nature of the file. The embedded URLs suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=dragon+ball+c+minecraft+mod+1.+12.+2
    • https://kutepazibug.weebly.com/uploads/1/3/4/4/134477769/monud_fatefewekisak_petapo_musigevikawo.pdf
    • https://static.s123-cdn-static.com/uploads/4467576/normal_5fe5dc5de1017.pdf
    • https://rinadulig.weebly.com/uploads/1/3/0/7/130739308/3113174.pdf
    • https://cdn.sqhk.co/mezutorixo/jehfsKs/83925873602.pdf
    • https://cdn.sqhk.co/midipumep/DFIiibB/38986893504.pdf
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f9e54c2de28d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4f7301e1-176d-4a30-adfa-03eed6b4c14e/xunef.pdf
    • https://s3.amazonaws.com/pegozegi/nudanaxusetixarorute.pdf
    • https://s3.amazonaws.com/kewakuko/gabebuvoxir.pdf
    • https://s3.amazonaws.com/levovod/97593581175.pdf
    • https://s3.amazonaws.com/tesapibebujep/ishihara_color_blindness_test_book.pdf
    • https://uploads.strikinglycdn.com/files/816255c8-406e-40b6-ad70-96fd948aab78/54300364567.pdf
    • https://s3.amazonaws.com/vifusupegiza/61633068799.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016180.bin
4a23f7269fa0b859367a1b0ce9c12790b8679ac8813de8397a004f3aed13d0f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16180 3328 bytes
font_01_sfnt_off00016d6e.bin
7f5c3d4e0d7bafe3386481d6ef0cec6c59be23ac7433418e069799d51e5659a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D6E 5520 bytes
font_02_sfnt_off00018028.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18028 1800 bytes
font_03_sfnt_off000188b6.bin
b65835326003930e2ddc0c7fec819dbe139936d881ff1a9d3d350beb0d08bda2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x188B6 19016 bytes

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