Malicious PDF — malware analysis report

Static analysis result for SHA-256 422ff032b596e157…

MALICIOUS

PDF

36.5 KB Authoring application: SWFTools
MD5: ada994f641e5b0501380d830c6daa9e4 SHA-1: 228129871b2cee9f83025af167afbd312ba84c19 SHA-256: 422ff032b596e157f601f8397b880d2b284f4bebeb6732216df947ccdcfb015b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule, indicating a large number of external links. The ML classifier also assigned a high probability of maliciousness. The embedded URLs, such as http://sunujuri.sampstealer.xyz/uploads/2020/01/27/fowapokosedut_julozozo_puxoxipu_gegutomidafo.pdf, are likely used to redirect users to phishing sites or download further malware. The document body contains a mix of seemingly random text and URLs, further supporting a malicious intent.

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 http://sunujuri.sampstealer.xyz/uploads/2020/01/27/fowapokosedut_julozozo_puxoxipu_gegutomidafo.pdf
    • http://chwichen.com/uploads/2020/01/27/16126195296cc.pdf
    • http://dasekun.indasoft.online/uploads/2020/01/29/zugagexaj.pdf
    • http://juvevizen.dom63.su/uploads/2020/01/27/5ae0c7b.pdf
    • http://xilodagupu.huaweinew.ru/uploads/2020/01/28/fufedemider_musakelekiwido.pdf
    • http://vaxexu.in-op.fun/uploads/2020/01/28/6810761.pdf
    • http://fiwimarketing.com/uploads/1/3/0/5/130588442/dewajisazasin_diwov_lazet_senivifemefom.pdf
    • http://fob.1amulet.ru/uploads/2020/01/28/19f69c9d.pdf
    • http://ecsog.ru/uploads/2020/01/29/3158103.pdf
    • http://natcha.online/uploads/2020/01/28/junegeda.pdf
    • http://mycambodonuts.com/uploads/1/3/0/4/130476255/jepuwomonezuruvi.pdf
    • http://kisepifi.masterpechi.ru/uploads/2020/01/27/dopovenosim-najuzeti-vijavovika.pdf
    • http://atlfoodista.com/uploads/1/3/0/6/130604547/tagiwewaketidas.pdf
    • https://bewesojus.weebly.com/uploads/1/3/0/6/130603929/vurubiramija.pdf
    • https://pixufasaru.weebly.com/uploads/1/3/0/6/130603975/wadasuxoxujo_tajol.pdf
    • http://badasscoinrings.com/uploads/1/3/0/3/130323286/mupeka_lupumulafaroku.pdf
    • http://myloveclub.ru/uploads/2020/01/28/3d527.pdf
    • https://sileniwatagofos.weebly.com/uploads/1/3/0/4/130483629/tusefux_genonedobewa.pdf
    • http://bsa-sccc-pack301.com/uploads/1/3/0/4/130483520/130483520.html#naughty+neighbor+mag

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001501.bin
2e9a528384845b449a612b19760e520e97975307f19bb1c784340c3fd3dfb94d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1501 7928 bytes

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