Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e8383e54dfb546…

MALICIOUS

PDF

64.0 KB Created: 2021-01-01 21:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b95dd7e950f90d50f5d8307b8d3e132 SHA-1: 87ecb15142a43a3feb9252992a0dcc0827fd4761 SHA-256: 17e8383e54dfb546b267f56eb0061d627cddffa2171ef233ab5b1551411b3f08
212 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, and is flagged by heuristics for malicious link farms and ML classification. The document body, though heavily obfuscated, suggests a lure related to downloading a game mod, which is a common tactic for phishing or malware delivery. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8038

Heuristics 4

  • 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
  • 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=lara+croft+relic+run+full+mod+apk+download
    • https://cdn.sqhk.co/xisiwuba/p6dic9k/47152975480.pdf
    • https://cdn.sqhk.co/xuxozowaki/fhghagd/word_link_table_of_contents_to_page.pdf
    • https://divamokavagi.weebly.com/uploads/1/3/4/8/134871471/najasamazikuterafusu.pdf
    • https://cdn.sqhk.co/powirafawume/gOgficb/32636810141.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vatakefojunib/kurofulotisopezif.pdf
    • https://s3.amazonaws.com/gebukil/calculator_for_ipad_1._0.pdf
    • https://s3.amazonaws.com/kalufizefem/51370512142.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/4445954836.pdf
    • https://s3.amazonaws.com/nonipesikiri/pororukugusegubetuzavun.pdf
    • https://s3.amazonaws.com/sigobija/jio_video_calling_app_now.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d99b.bin
bc25beb254c57f45640e0db96031acfdb13fde84eec87c384bcc25f37af515af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD99B 5220 bytes

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