Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cea87ccd7e99763…

MALICIOUS

PDF

44.2 KB Authoring application: QPDF
MD5: fff81be65d3053c452571e410c26c54c SHA-1: ebe831f79b759582ef66344c6a40b492da06234b SHA-256: 5cea87ccd7e9976305541706cc6ac9e07a6699edd65485d15c6c488f74bdc385
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, many of which point to other PDF files, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a phishing lure that attempts to redirect users to malicious sites.

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://kellypritchardhair.com/uploads/1/3/0/4/130483820/roruvefogux.pdf
    • http://guzupe.yusufkalayci.com/uploads/2020/01/29/4fd0fe.pdf
    • http://vulufevol.tamita-tami.pro/uploads/2020/01/28/zuvirag-lugef-judadasum-nudinituxo.pdf
    • http://seattlebreastfeedinghikes.com/uploads/1/3/0/6/130604812/pizafozudes.pdf
    • http://zotegabas.newneonaslimm.com/uploads/2020/01/29/dudaziso-dofatadu.pdf
    • http://kidskeepcharlestonclean.org/uploads/1/3/0/4/130488294/4307bc35430d3.pdf
    • http://rome.migraskop.com/uploads/2020/01/28/petonixato.pdf
    • http://couponrupee.in/uploads/2020/01/28/vativugir_zelegosariso_lamuf.pdf
    • http://zifomuvoj.vmeshatelstva-na-trubah-yaichnikah.ru/uploads/2020/01/29/rafizozu.pdf
    • http://thebrandonkeiffershow.net/uploads/1/3/0/5/130551103/23f5161de.pdf
    • http://mkrishnan.org/uploads/1/3/0/2/130270763/7a8ad4.pdf
    • http://afhbuilders.com/uploads/1/3/0/5/130538866/jijim.pdf
    • http://nilenate.clinicalresearchorganization.ru/uploads/2020/01/27/18265.pdf
    • http://xenuwep.service-ptauthentication.com/uploads/2020/01/27/jegis-desikon.pdf
    • http://gonatuz.theerachaiit.online/uploads/2020/01/28/2947598.pdf
    • http://menusie.com/uploads/1/3/0/6/130604222/e635de87b8f7c2.pdf
    • http://koala-d.com/uploads/1/3/0/6/130620869/zoweworitozek.pdf
    • http://sweetestdreams.org/uploads/1/3/0/4/130483799/130483799.html#sales+and+marketing+resume

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000150e.bin
e34d3d5c89f17b4d3a128429a6cb9233dd30ed1b36fabb8a9337683c64bef7a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x150E 8440 bytes

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