Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0688dc3377a7a3…

MALICIOUS

PDF

36.0 KB Authoring application: LibreOffice First seen: 2020-09-24
MD5: 28f9402e5bfd1a1311407b8c89f44752 SHA-1: 1f05548e564d0d962b655c1a86724b8692511800 SHA-256: 7a0688dc3377a7a3e1b3eefd233876b98acfaf17aef01753f334df635fa2fcce
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique commonly used in SEO link farms to distribute malicious content or phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the nature of the embedded links suggests a potential for JavaScript execution or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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.
  • 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://petshopmiabob.club/uploads/1/3/0/2/130291531/bofuniwejefaz_bewafewani.pdf In PDF document text
    • http://cidadegoias.com/uploads/1/3/0/5/130590482/pokatadogo.pdfIn PDF document text
    • http://brownwoodhealthdepartment.com/uploads/1/3/0/6/130620782/9848888.pdfIn PDF document text
    • http://mail.notalucascoaching.com/uploads/1/3/0/6/130620505/relevetevug.pdfIn PDF document text
    • http://updatededucator.com/uploads/1/3/0/9/130969591/0896183298e5.pdfIn PDF document text
    • http://elitelawncare.org/uploads/1/3/0/5/130590613/letadipavipame.pdfIn PDF document text
    • http://yourfurbaby.com/uploads/1/3/0/5/130589163/c0863fa9a26cdc.pdfIn PDF document text
    • http://teachinggeographybusinesscommerceaustralia.com/uploads/1/3/0/7/130775542/sodusimimukedo.pdfIn PDF document text
    • http://livingriverchurch.net/uploads/1/3/0/4/130435850/c82f5.pdfIn PDF document text
    • http://www.newlifefrostburg.com/uploads/1/3/0/7/130739628/1250529.pdfIn PDF document text
    • http://muffettakrueger.com/uploads/1/3/0/8/130814030/kadatev-nebasenem.pdfIn PDF document text
    • http://lucykatecrafts.com/uploads/1/3/0/7/130740443/leterosotawuv.pdfIn PDF document text
    • http://photos-by-neill.com/uploads/1/3/0/6/130639554/5728579.pdfIn PDF document text
    • http://vacuumroomba.com/uploads/1/3/0/3/130379488/powigilaf.pdfIn PDF document text
    • http://www.thelyffoundation.org/uploads/1/3/0/8/130814100/1708370.pdfIn PDF document text
    • http://ourlibertypark.net/uploads/1/3/0/4/130489371/8a3b4d47c8b2.pdfIn PDF document text
    • http://baomahuiyulechengkaihu.br3h.com/uploads/1/3/0/5/130551618/130551618.html#child+belly+pain+at+nightIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3354 7088 bytes
SHA-256: c46c68bfafd2f7e16700cb80452c1df1e2be13cb8d431b809f4e8253a582775a