Malicious PDF — malware analysis report

Static analysis result for SHA-256 13f691182f518b1c…

MALICIOUS

PDF

39.8 KB Authoring application: Karbon
MD5: 5595afa87dc32cbb29295a6e32cce747 SHA-1: 99949909d10383da1d5d584d1bcab4f341990658 SHA-256: 13f691182f518b1cbd04d6e767b868c4d1ab3e2b860a3b55901e812d76231593
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links to external PDF documents hosted across various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as flagged by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, and the document body content is heavily obfuscated and truncated, preventing a deeper analysis of its specific intent beyond link distribution.

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://warrenbaker.org/uploads/1/3/0/2/130272856/jibukekozesobum.pdf
    • http://chelseavanleuven.com/uploads/1/3/0/4/130483806/7383935.pdf
    • http://www.genesisframes.co.uk/uploads/1/3/0/3/130323131/nirivinotekorod_gamakizan.pdf
    • http://diversifyai.org/uploads/1/3/0/5/130589245/sogifagiko-muvaxelafukig-pegafogigikoli.pdf
    • http://oakleighfarmstud.com/uploads/1/3/0/6/130639780/3077295.pdf
    • http://naturallifearchive.org/uploads/1/3/0/5/130551491/kodugexem.pdf
    • http://www.livingchildinc.com/uploads/1/3/0/5/130544313/somazoxukanur.pdf
    • http://danaink.org/uploads/1/3/0/6/130639852/3662901.pdf
    • http://onestepborders.com/uploads/1/3/0/5/130542902/gujux.pdf
    • http://webdisk.iqraacademy.us/uploads/1/3/0/6/130604269/a597e.pdf
    • http://webmail.sacredeartharomatics.com/uploads/1/3/0/8/130814935/faberurodop-memux-woxezuladu.pdf
    • http://www.purplepipes.co/uploads/1/3/0/3/130379770/2040461.pdf
    • http://nwspecialtylumbermill.com/uploads/1/3/0/4/130476034/papadudewutimof_revub.pdf
    • http://leagueofwickedstepmothers.com/uploads/1/3/0/6/130604210/e4d68c7b91e8f4.pdf
    • http://trustedfinancialpro.com/uploads/1/3/0/5/130551210/rojak-zukeji-xamunune-xinukilugurago.pdf
    • http://stonelakecounseling.com/uploads/1/3/0/2/130272081/sewozubek.pdf
    • http://www.beautybyellav.com/uploads/1/3/0/5/130550952/d6d60.pdf
    • http://mmmorandyslandscaping.com/uploads/1/3/0/8/130814066/kuneti-sefifomedut.pdf
    • http://mta-sts.mail.avcri.com/uploads/1/3/0/6/130604529/8440b0f550e.pdf
    • http://mta-sts.mail.restaurant-lindenberg.ch/uploads/1/3/0/5/130589061/8ac9118fd12b11.pdf
    • http://www.thingsthingsthingsthingsthingsthings.com/uploads/1/3/0/7/130740097/9165187.pdf
    • http://dogcreekrotties.com/uploads/1/3/0/7/130776725/piburogixanujo.pdf
    • http://dylanwyke.com/uploads/1/3/0/6/130639712/130639712.html#spread+plate+and+pour+plate+method

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003adc.bin
864f2bb7ef237fa5bc53221641f32fb68413485050272a5287f3dd935b6a8d16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3ADC 7584 bytes

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