Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3336f0978d8dab0…

MALICIOUS

PDF

33.4 KB Authoring application: GIMP
MD5: 058d48151e34f10ceb16b350fae828c7 SHA-1: cb59a306a38dccc4b3b4f8efe5683a832543f60f SHA-256: d3336f0978d8dab09f281409a3a9f15473a883b290fd34f6be7d750d5afbe8a6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs pointing to other PDF files, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs are the primary IOCs for this attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://reidangus.com/uploads/1/3/0/5/130588396/bdde0f4bfe87.pdf
    • http://powerdigmenergysolutions.net/uploads/1/3/0/6/130640229/saxosuj.pdf
    • http://northpointed.com/uploads/1/3/0/5/130551279/legesi-rujetisow-jarad.pdf
    • http://www.2inspire2bfree.com/uploads/1/3/0/7/130776629/vesigur_lowojipimakuvur.pdf
    • http://www.ciumontreal.com/uploads/1/3/0/4/130476401/9134706.pdf
    • http://shotcomposer.com/uploads/1/3/0/3/130313603/tazuzowi-wowezoxalo-sosebobap.pdf
    • http://buttoncrush.net/uploads/1/3/0/7/130738777/buzemebezive.pdf
    • http://newtraditionworcester.net/uploads/1/3/0/2/130289611/jizasuzolo.pdf
    • http://baysideschoolrefusalclinic.com/uploads/1/3/0/5/130588343/vituso-gamumigasafabe-petadu-tefifan.pdf
    • http://afriwendythread.com/uploads/1/3/0/5/130550970/pilesobetawus-nepibajusom-zejuzagulatuxo-fesub.pdf
    • http://haiwangxingxianshangyuledaili.br3h.com/uploads/1/3/0/5/130545189/130545189.html#abba+happy+new+year+songtext

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b64.bin
4782abe0b23398fda89d9352ba8172b8d859b11e2168aea9b3035fe96c4cebc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B64 8584 bytes

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