Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a00ca63c6c03d0…

MALICIOUS

PDF

41.1 KB Created: 2020-09-29 23:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f9f913603fb5e2e8becf70cd3d96b24 SHA-1: 82c3949cb91b60541f016946c24dff21017cf4f6 SHA-256: b1a00ca63c6c03d056785b845f10b601e392425b39140578a2b1b57986896949
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a malicious site. The document body, though heavily obfuscated, contains URLs that are likely part of the redirection chain. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves social engineering through a seemingly legitimate document that redirects to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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/strik?keyword=analysis+and+interpretation+of+qualitative+data+in+consumer+research+pdf
    • http://files.meaningfulhealthhurunui.org/uploads/1/3/2/6/132695388/2889879.pdf
    • http://wopube.dslvnjny.com/uploads/1/3/2/6/132696056/18b0ff5.pdf
    • http://bomefovib.jackssf.com/uploads/1/3/1/4/131437657/2a0b2e02a57.pdf
    • http://kaxupipi.wvsabc.com/uploads/1/3/2/8/132815176/54bfbf338.pdf
    • http://vajifixaw.heisyourlife.com/uploads/1/3/2/8/132814900/wenilusif-falomidor-fekodokexugafaf-zukovumo.pdf
    • https://site-1037869.mozfiles.com/files/1037869/37179227700.pdf
    • https://site-1036640.mozfiles.com/files/1036640/48905736952.pdf
    • https://site-1037266.mozfiles.com/files/1037266/86744798592.pdf
    • https://site-1037094.mozfiles.com/files/1037094/48201994791.pdf
    • https://site-1036621.mozfiles.com/files/1036621/pelazo.pdf
    • https://site-1037163.mozfiles.com/files/1037163/nevekumo.pdf
    • https://site-1037124.mozfiles.com/files/1037124/32250000581.pdf
    • https://site-1036955.mozfiles.com/files/1036955/kobexelu.pdf
    • https://uploads.strikinglycdn.com/files/25af64cf-9986-44b1-ac26-586163e27158/fabadilanewo.pdf
    • https://uploads.strikinglycdn.com/files/f00a122d-3c89-43e1-8e9d-c019cebbc6b4/22789615665.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061af.bin
345bde0ba6c0c26630dc386065cd4e25403f7f3d86c2e5f1ed7d95d51f10fa19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61AF 5672 bytes
font_01_sfnt_off000074e1.bin
f40084f0ff7cb3ff463b4bcf027f05f871167623188a864fec1cdfbb5165b6a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E1 9920 bytes

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