Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b681f3dcbb26d9…

MALICIOUS

PDF

51.7 KB Authoring application: LibreOffice Draw
MD5: 04ff94f7fac5641a3c29da02b4044276 SHA-1: 32d45d8764a493a319479d1904f3a20854c1063e SHA-256: 15b681f3dcbb26d98abf45cba302fe1766001d98ea5b8b69b7415c771f93f364
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malicious content distribution scheme, as indicated by the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the critical heuristic 'PDF_SEO_LINK_FARM'. The document contains a large number of embedded URLs, all pointing to PDF files hosted on various domains, suggesting an attempt to redirect users to malicious content or exploit SEO techniques for distribution. The presence of urgency language further supports a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://stteresaofavilacatholiccommunity.org/uploads/1/3/0/6/130620868/1679958.pdf
    • http://santafeaviation.org/uploads/1/3/0/5/130589285/72b857a0003.pdf
    • http://sustainability-consortium.com/uploads/1/3/0/8/130873850/zifowejapiked-ruxunarep-dinekovefuzofod-fusarijix.pdf
    • http://nutritionbylaurann.com/uploads/1/3/0/4/130489410/neluz-lebukobilizu-wowavilumozev.pdf
    • http://cpanel.futurespresent.com/uploads/1/3/0/7/130776346/binol_wuluwowaf.pdf
    • http://www.humphreysfreelancemedia.com/uploads/1/3/0/4/130493476/vudow.pdf
    • http://checksymptom.com/uploads/1/3/0/5/130589101/0b48756bb7.pdf
    • http://skyeguy.com/uploads/1/3/0/5/130538817/f5ee59a0dc2aa.pdf
    • http://blessedbybliss.com/uploads/1/3/0/6/130640032/2010048.pdf
    • http://store.themovementdr.net/uploads/1/3/0/6/130621083/pomepuxavu.pdf
    • http://cpanel.kingfishercct.org/uploads/1/3/0/7/130776033/9acc9c8da7e.pdf
    • http://eflrawfoods.com/uploads/1/3/0/6/130639651/a312d.pdf
    • http://nycgymnasticsmovement.org/uploads/1/3/0/4/130483499/lifarikeda-tukikumenujizam-wonupe.pdf
    • http://mentorpreschools.com/uploads/1/3/0/5/130551226/9012c49a01d662.pdf
    • http://webmail.lambersfisher.com/uploads/1/3/0/5/130551239/xudapubedavi.pdf
    • http://erguvanmobilya.com/uploads/1/3/0/6/130622005/robelokuko_regebededujate.pdf
    • http://sitgmo.org/uploads/1/3/0/3/130379065/xegipawizezanekulewo.pdf
    • http://sidemountainspecialtyfoods.com/uploads/1/3/0/5/130590186/8919484.pdf
    • http://nuzzdos.com/uploads/1/3/0/5/130539215/a4897f3e4c.pdf
    • http://mountainviewmentalhealth.com/uploads/1/3/0/5/130588199/nurepovimaganebap.pdf
    • http://supernatural-wellness.com/uploads/1/3/0/4/130435895/zaraxum_rewugusuv_zezenive.pdf
    • http://74-123-79-231.mgwnet.com/uploads/1/3/0/9/130969841/130969841.html#pathophysiology+of+placenta+previa+in+flow+chart

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001299.bin
77f81a119656fad77cbc19334e8e8f8d1c3837b31bb03f8707325a9f87189505		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1299 8116 bytes

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