Malicious PDF — malware analysis report

Static analysis result for SHA-256 053d63c09f0ca27f…

MALICIOUS

PDF

58.4 KB Created: 2020-12-05 19:32:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3db509fa1df6b8fd023d2e17aa0fb7b4 SHA-1: 6a46999aa9dc8132171d6cdf6c77a03451a324d6 SHA-256: 053d63c09f0ca27f3e88cdb7a16452316e9cd02008cfc6bd4b2bd414190e5b7b
212 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a PDF SEO link farm. The embedded URLs suggest an attempt to redirect users to potentially harmful content, likely for malware distribution or phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9123

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/aws?utm_term=android+casual+games+mod+apk
    • https://zulujiporanaru.weebly.com/uploads/1/3/4/5/134590758/8566915.pdf
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f9595f925469.pdf
    • https://luvikexixof.weebly.com/uploads/1/3/4/4/134481561/ef4c0f7127a.pdf
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/8039758.pdf
    • https://mabufome.weebly.com/uploads/1/3/4/8/134880487/8863431.pdf
    • https://cdn-cms.f-static.net/uploads/4414860/normal_5f9e408572620.pdf
    • https://cdn-cms.f-static.net/uploads/4420013/normal_5fc174b0edde4.pdf
    • https://cdn-cms.f-static.net/uploads/4422148/normal_5f9d90047e4c9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc78acea4492a057e240f0a/t/5fc814be094cf7617db20319/1606948045228/total_meltdown_apk.pdf
    • https://s3.amazonaws.com/folexapurilowe/40896084260.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf61943c6ccf69f3562f28/1606377877374/that_sugar_film_video_worksheet_answers.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf62a7a97599144eef462a/1606378152413/sony_vegas_pro_13_serial_number_2019.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b554.bin
278a349f319f0ce49947347e22dfaa3aaa6c76df774ed76de7a948315e9295c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB554 5448 bytes
font_01_sfnt_off0000c7bc.bin
41b1d91aac0987b562aaaddd11767cbb87a1bc25424fcb470778cc58c6407b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BC 1860 bytes

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