Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb263f7c8a6c409…

MALICIOUS

PDF

44.0 KB Authoring application: Karbon First seen: 2020-09-24
MD5: ce2814938d02d85c34a53faa1019fedd SHA-1: cb4e6e87f64cf525f4d0a4c6da8764b645f99865 SHA-256: 9fb263f7c8a6c409f0c7e379dc799d12953b0cb46ef8d1c7942aaf00d3b22f64
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. While no scripts were directly extracted, the heuristic firings point towards a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://emilyrunkle.com/uploads/1/3/0/2/130270986/ebf26d8b4.pdf In PDF document text
    • http://prosolutionshomeimprovementgmail.com/uploads/1/3/0/6/130621897/16fb5ce9a19.pdfIn PDF document text
    • http://haircreationsbyjay.com/uploads/1/3/0/2/130271030/zexudu.pdfIn PDF document text
    • http://luckyrabbiteditions.com/uploads/1/3/0/2/130289163/xulugewadu.pdfIn PDF document text
    • http://rentatek.net/uploads/1/3/0/8/130814052/rumiwujoramajo.pdfIn PDF document text
    • http://ecfya.com/uploads/1/3/0/4/130476043/libanewa_narab.pdfIn PDF document text
    • http://strategicengine.com/uploads/1/3/0/4/130435547/52236.pdfIn PDF document text
    • http://mohawkvapors.com/uploads/1/3/0/3/130313702/xadakaposuf.pdfIn PDF document text
    • http://ns1.sebastianjamesfoundation.org/uploads/1/3/0/6/130620948/d6f472e34093c.pdfIn PDF document text
    • http://adentamalaysia.com/uploads/1/3/0/6/130603930/lugiwavorixivolutis.pdfIn PDF document text
    • http://theselfishparents.net/uploads/1/3/0/6/130621702/ac230e601724.pdfIn PDF document text
    • http://swepta.com/uploads/1/3/0/7/130739376/suwufidiredage_buwigex_darewinela_jefager.pdfIn PDF document text
    • http://www.rebeccamguzman.com/uploads/1/3/0/8/130874220/713ec84715b.pdfIn PDF document text
    • http://mphcustomgraphics.com/uploads/1/3/0/7/130776100/380580.pdfIn PDF document text
    • http://exportcomfort.com/uploads/1/3/0/5/130550693/1993065.pdfIn PDF document text
    • http://unityofstockton.com/uploads/1/3/0/6/130640019/futuwugowoga-fulogoja-xewumute-bikis.pdfIn PDF document text
    • http://nicciballinger.com/uploads/1/3/0/4/130476649/gufiziraw.pdfIn PDF document text
    • http://globallycraftedtravel.voyagerwebsites.com/uploads/1/3/0/6/130620317/130620317.html#list+of+most+common+german+adjectivesIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4107 2864 bytes
SHA-256: 6dc6e07f93ae70488a19e8a398a1c6cda2f5723fc3d3cbe180c5afbb10c3611e
font_01_sfnt_off00004de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DE7 8880 bytes
SHA-256: 96d3f1c5232d7e86cb58dad1d4a83d23bd51a50abf4bcc00765376be3b03aa80

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