Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9637435a2db997b…

MALICIOUS

PDF

37.4 KB Authoring application: LibreOffice
MD5: 044c1b4ee7a46a34c80569a61423e48d SHA-1: 176e9be363596a55d098f32f1e92d51cb153b078 SHA-256: f9637435a2db997bb5309c4976d05ba05a9c84740db8082c7675f527ecde32ed
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to other PDF files hosted on various domains, indicative of a link farm. This technique is commonly used to distribute malware or conduct phishing campaigns. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 https://gijapejevekozat.weebly.com/uploads/1/3/0/5/130588168/7b8c61f8b229.pdf
    • https://ruruxofuki.weebly.com/uploads/1/3/0/3/130313748/davazenejod.pdf
    • http://biasranch.com/uploads/1/3/0/6/130604756/tozejeli_birodivux.pdf
    • http://3pointbball.com/uploads/1/3/0/4/130435905/9304564.pdf
    • http://mychicagorides.com/uploads/1/3/0/2/130273798/f391c.pdf
    • http://jegiruw.darkempires.ca/uploads/2020/01/28/9717839.pdf
    • http://laediveclub.org/uploads/1/3/0/5/130590588/25f05668b.pdf
    • http://nuded.copyrightcontact-1000029438567.com/uploads/2020/01/27/e497aec32b4a80.pdf
    • http://50staaten.com/uploads/1/3/0/5/130545666/8035527.pdf
    • http://jifemikojo.buygame.xyz/uploads/2020/01/28/sajakezegol_julojozotigugid_vusotuverivupo_mapavinojuferax.pdf
    • http://sweetestdreams.org/uploads/1/3/0/5/130542813/130542813.html#methods+of+multivariate+statistics+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000128d.bin
2e24bf9b0b1419e67d7bc632330954f5e39410df03f92211ec41cfb35afcbc40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128D 8332 bytes

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