Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8834575e9048733…

MALICIOUS

PDF

37.3 KB Authoring application: Karbon
MD5: f915d43a5e354021582e6a1e311ac57a SHA-1: fc0b8986838a546644420fe07bf9fcb79f3cc8c2 SHA-256: b8834575e90487332491749ce46c48ed2ae48fe90a737b0167848af9dbb664f4
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 external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS classifier and ClamAV detection further support its malicious nature. The primary attack pattern involves redirecting users to a vast array of URLs, likely to distribute malware or engage in phishing activities.

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://tinirawuni.sargar.ru/uploads/2020/01/27/73b173e70.pdf
    • https://zelugeso.weebly.com/uploads/1/3/0/6/130603930/mipenibidudi.pdf
    • https://fanusosedavin.weebly.com/uploads/1/3/0/4/130483552/pixasovijune.pdf
    • http://carrolltennis.com/uploads/1/3/0/5/130539267/xosusurojuloboxit.pdf
    • http://xutebeti.juanpablomartos.com/uploads/2020/01/28/d4e068046.pdf
    • https://duvumojeda.weebly.com/uploads/1/3/0/4/130483667/5491962.pdf
    • https://duzixikepur.weebly.com/uploads/1/3/0/2/130270834/litidokotasu.pdf
    • http://laligalatinafinanciera.com/uploads/1/3/0/2/130273581/5211742.pdf
    • http://loveofland.shop/uploads/1/3/0/5/130544313/56395.pdf
    • http://pharmaexpo.tech/uploads/2020/01/29/1538855.pdf
    • http://danorafevu.idealista-login.com/uploads/2020/01/28/visitofefep_wifunolepili_guzajopiso_jujene.pdf
    • http://xetenel.giktarin.ru/uploads/2020/01/27/234355.pdf
    • http://agm26.icu/uploads/2020/01/27/bokaxu.pdf
    • https://vimozewolamivo.weebly.com/uploads/1/3/0/6/130604326/6498110.pdf
    • http://guril.support-account.net/uploads/2020/01/27/65330.pdf
    • http://joeyguarino.com/uploads/2020/01/27/cd4ff4a4f6c840.pdf
    • http://rod.mu-unsleep.fun/uploads/2020/01/28/2965134.pdf
    • http://dakemozoz.kuprygin.com/uploads/2020/01/28/7362678.pdf
    • http://wufe.moegnezdo.com/uploads/2020/01/28/lusemudopotirun_fadere_sutokofo.pdf
    • https://badakukesewuriz.weebly.com/uploads/1/3/0/3/130313013/jikuziwutol.pdf
    • http://berezina.pro/uploads/2020/01/27/motujuxipix-konobo-sinufadik-tekefitovaxuj.pdf
    • http://sleukrithmotionpicture.com/uploads/1/3/0/5/130551160/130551160.html#mitosis+worksheet+and+diagram+identification

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000160b.bin
66207fd2991081195ed741caec3d33ddbc4088441771ff6e479d2d29285ffd88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160B 8024 bytes

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