Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ff81e24942b99e…

MALICIOUS

PDF

46.0 KB Authoring application: GIMP
MD5: a2997d833529a0fcf5ecd51d1e28cb3f SHA-1: 881ab792cd5d1cbb6a7f745efea991fa9407d0e9 SHA-256: 03ff81e24942b99e2bd42bc422ef80c0975317e8a907d929941291a71a83203f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URLs are the primary IOCs, suggesting a campaign to drive traffic to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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
  • 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://1cafedumarche.ch/uploads/1/3/0/5/130588772/8192291.pdf
    • http://audioallure.com/uploads/1/3/0/6/130605186/xusimekewofake.pdf
    • http://artfullofjoy.com/uploads/1/3/0/5/130588939/fefazabotinawapirude.pdf
    • http://pinehill-in-the-catskills.com/uploads/1/3/0/2/130273814/jewipozulubem.pdf
    • http://budsmotorauctions.com/uploads/1/3/0/2/130287943/5136995.pdf
    • http://nekebe.vipiski-besplatno36.icu/uploads/2020/01/29/voxulaguwukobaso.pdf
    • http://mlachomes.com/uploads/1/3/0/6/130621233/45cfa1135c4277.pdf
    • http://mindfulneuropsych.org/uploads/1/3/0/2/130288565/zumasefa.pdf
    • http://dmgatl.com/uploads/1/3/0/4/130490277/togegezomase.pdf
    • http://truexagency.com/uploads/1/3/0/3/130313786/guvopuzaduwerop.pdf
    • http://superspysaucecompany.com/uploads/1/3/0/6/130604054/nisewok.pdf
    • http://acouturelife.com/uploads/1/3/0/6/130604724/130604724.html#microcanonical+partition+function
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012d8.bin
4aaaabd704458cff72280d3a87bcff16279d7783d1399fa4d66a62b6aef14275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8 8236 bytes
font_01_sfnt_off0000632d.bin
ab3f35905e85beacd263675b86349ff2bfae2f31e268531550138b91673c1b34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632D 2868 bytes
font_02_sfnt_off00006cbc.bin
9b9be86836f471a5521953cc079f15ea19d550a56d988a7ecc96479b69f68d8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBC 16124 bytes

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