Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d925310330f9548…

MALICIOUS

PDF

37.0 KB Authoring application: Poppler-utils
MD5: e57ebf891863825f1054f62ec4b14191 SHA-1: 08a5c6d2082003eb314234927cee00fb063f5f4f SHA-256: 6d925310330f9548013c4f1bee60c0404d104ef5dcfd2f057bab5f1c7357dc83
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing or traffic redirection. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to malicious 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://noosateardropflags.com/uploads/1/3/0/3/130313027/mijozizafora.pdf
    • http://7sevensteps.com/uploads/1/3/0/6/130605490/wiwagusuti-zizugo-kebobi-lalimusizofaxo.pdf
    • http://treeservicemagnoliatx.com/uploads/1/3/0/4/130483239/542032.pdf
    • http://mubupupis.royalemates.com/uploads/2020/01/28/topudusisitan_puvamakoxufopap_tiwubofa.pdf
    • http://nepservicesinc.com/uploads/1/3/0/6/130622049/xudoj.pdf
    • http://barricas.nl/uploads/1/3/0/3/130313107/3442042.pdf
    • https://senatuwevida.weebly.com/uploads/1/3/0/6/130604486/nupuv_paxuwaroroxeto_depofomo.pdf
    • http://stevejager.com/uploads/1/3/0/4/130436451/130436451.html#pathfinder+cord+of+stubborn+resolve
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011a3.bin
1205fcbdf48130e5bb7c45022c4b8d1a97e4712aacab24b8ac07c1c73ce40bc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3 8432 bytes
font_01_sfnt_off000049fb.bin
6db2f878e0fd57d3a351d0d81a5ccd7b58f68df6728dadc3aee3ebeb1a1d6e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49FB 16068 bytes

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