Malicious PDF — malware analysis report

Static analysis result for SHA-256 688e27f9453de795…

MALICIOUS

PDF

41.5 KB Authoring application: Karbon
MD5: 6ef8e64c0d215d44340fe9ec9448f1b8 SHA-1: 486b262f2c5ad125eeaeaf1ca545200703cb380f SHA-256: 688e27f9453de795b361872c6e4d5ace959bc458fe4c1ecc63a2fc3e35db25e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a link farm, and a visual download button lure. ClamAV detection and ML classification strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://webmail.lemoyne.org/uploads/1/3/0/7/130776304/838ede09dc81fed.pdf
    • http://jinyu.us/uploads/1/3/0/4/130483906/wogavoto.pdf
    • http://arcc06quebecmetropolitain.com/uploads/1/3/0/5/130588548/rapuw.pdf
    • http://peggyjoyceruth.net/uploads/1/3/0/5/130545396/75f62bb9972a.pdf
    • http://mickeyandmalia.com/uploads/1/3/0/5/130550854/jogoxavinevutev_mexan.pdf
    • http://interactivestartups.com/uploads/1/3/0/6/130621470/d714ad4fad.pdf
    • http://silvervigor.com/uploads/1/3/0/5/130544386/zubibenekukelun.pdf
    • http://realestateromantics.com/uploads/1/3/0/7/130740151/gepajugov_zeduxe_dufev.pdf
    • http://lolman.net/uploads/1/3/0/2/130289630/4482382.pdf
    • http://ricemachining.com/uploads/1/3/0/2/130288492/wetowixomutek_bazit_xosegu_kugutumaxokojim.pdf
    • http://challengeyourlegal.com/uploads/1/3/0/5/130539054/1892290.pdf
    • http://needlot.net/uploads/1/3/0/5/130541950/4454363.pdf
    • http://peshtolina.com/uploads/1/3/0/2/130291779/gixagetef_faduvanixadon_pozas.pdf
    • http://capitalball.com/uploads/1/3/0/6/130620625/8072461.pdf
    • http://mytexanlife.com/uploads/1/3/0/7/130776405/b6848.pdf
    • http://lovehealthservice.net/uploads/1/3/0/6/130621000/tezoz-molef-rozirufama-wenuxok.pdf
    • http://nikkichung.net/uploads/1/3/0/7/130776852/4639072.pdf
    • http://test.bradleyparker.ca/uploads/1/3/0/5/130542863/gojomuxononum.pdf
    • http://hostmaster.newskinandcare.com/uploads/1/3/0/4/130435893/130435893.html#professional+application+letter+sample+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000459e.bin
e55e8e1b289a7a68f3dfb3f4bf05347ff0e5976c267a5c23418f19070a8b0f74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x459E 7636 bytes

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