Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1a8fb3fa3827c8…

MALICIOUS

PDF

41.8 KB Authoring application: PDFedit First seen: 2020-09-07
MD5: 04bae02e65287b7137bc7769a9219ec1 SHA-1: b2992b1ce4bf8ee6d5a3efb5a343063fa9699d48 SHA-256: 5d1a8fb3fa3827c8c0bcc5e6e2efafbab5396e1257819a043cf27a4914d3a6e4
172 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to external PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_LINK_FARM' and the ML classifier strongly indicate malicious intent, likely to distribute further malware or phishing content. No scripts were extracted, but the structure and embedded URLs point to a phishing or content-distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://atlbloggers.com/uploads/1/3/0/6/130621300/f918e316f7cd5.pdf In PDF document text
    • http://mathens.net/uploads/1/3/0/4/130435574/sukuwurexolenu-jiravunegogojib-rivuxoxiruli.pdfIn PDF document text
    • http://newelementkc.com/uploads/1/3/0/6/130621854/nosenivupubexanufoxu.pdfIn PDF document text
    • http://forecastcreative.com/uploads/1/3/0/2/130272619/729bce8c6.pdfIn PDF document text
    • http://copperpotcreative.com/uploads/1/3/0/2/130274345/diwax.pdfIn PDF document text
    • http://staceyjanedouglas.com/uploads/1/3/0/2/130273814/c52aaab3addc38.pdfIn PDF document text
    • http://polato.net/uploads/1/3/0/5/130551141/sakivoranu-vojaxog-kuzagewifaf-madolox.pdfIn PDF document text
    • http://pameladirnberger.com/uploads/1/3/0/5/130539696/130539696.html#supercapacitors+review+pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179 8644 bytes
SHA-256: 966a3fbd9a0c74da7f01b9c62dd4c88f214d4e67f4fe762bb9a1c7574f021cde
font_01_sfnt_off00005ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB6 4524 bytes
SHA-256: 0069f13915edab9d80a8dce905535a34121a50b902328e3d862864564fef7ef5
font_02_sfnt_off00006889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6889 2600 bytes
SHA-256: 41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee

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