Malicious PDF — malware analysis report

Static analysis result for SHA-256 076b8343cbd90695…

MALICIOUS

PDF

93.6 KB Authoring application: QPDF
MD5: f84c78134b9cd06055834806053e5a95 SHA-1: 1cdbd7e4a1e99b891a78054b43474fab68a4bf84 SHA-256: 076b8343cbd906951490bdf153145da5e92bb163a7b9bbec49035d22e270c4d3
192 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDF files, indicating a link farm designed to distribute malicious content. The presence of a 'Password-protected archive handoff' heuristic suggests this PDF may be a lure to obtain a password for a separate malicious archive. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 4

  • 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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://snappornity.com/uploads/1/3/0/5/130588850/wafede.pdf
    • http://accreteequitypartners.com/uploads/1/3/0/3/130313107/lesadatebisixes-tejedemedakit.pdf
    • http://splashevents.co.za/uploads/1/3/0/2/130272918/jigax.pdf
    • http://vikkisvinyl.com/uploads/1/3/0/5/130588620/soduzifugunit.pdf
    • http://mossyjimsrocks.weebly.com/uploads/1/3/0/5/130551671/lotelipuvekonirabad.pdf
    • http://biggerpicture.shop/uploads/1/3/0/6/130639395/wigegeg-jesesonixi-purizisebadixi.pdf
    • http://socialbutterflyslp.com/uploads/1/3/0/5/130541031/kurokukizuninixafo.pdf
    • http://ram.viniciusmelo.online/uploads/2020/01/28/6538830.pdf
    • http://coreducate.com/uploads/1/3/0/7/130775391/322178.pdf
    • http://benkregel.com/uploads/1/3/0/2/130270808/130270808.html#anaerobic+digestion+sludge+treatment
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000117f.bin
d79e5915f05af3bcd713df88aff5f93cca41f1f80c5315bf50385a8cd6048933		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117F 9876 bytes
font_01_sfnt_off0000ad4c.bin
93a6b667d9a0503f29ead18684ace14e4afecb4865bc97b8e43ab863f7c7f1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD4C 2680 bytes

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