Malicious PDF — malware analysis report

Static analysis result for SHA-256 438f35494ed9df9d…

MALICIOUS

PDF

64.0 KB Created: 2021-02-25 11:17:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: edf9793c03d4fbecd431996be7a9fc66 SHA-1: 36c92dbfb0f24e57cdc8c151fddacdd1226a8581 SHA-256: 438f35494ed9df9dc35432541b3c40897133c016cf736afde302a62064cf1177
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM', suggesting an attempt to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9720

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://bologen.ru/award?keyword=big+fish+audio+momentum+%25E4%25BD%25BF%25E3%2581%2584%25E6%2596%25B9 PDF link annotation
    • http://bagerisevi.scienceontheweb.net/moen_sink_faucet_parts_diagram.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/79355134740.pdfIn PDF document text
    • https://xepawonim.weebly.com/uploads/1/3/0/7/130776577/6028571.pdfIn PDF document text
    • http://5gusevshop.space/witcher_books_in_ordertb9pe.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/city_racing_2018_3d_uptodown0syp8.pdfIn PDF document text
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/dozunibavus_jeditoxomudi.pdfIn PDF document text
    • https://lolorude.weebly.com/uploads/1/3/0/7/130775760/2606121.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/74139503373.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/father_s_day_worksheets_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/laminated_board_sheets.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/50839918503.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/joint_venture_agreement_template_word.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/20859359572.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/72930676837.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/37306794467.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/free_software_borland_turbo_c_4._5.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 7456 bytes
SHA-256: 71df7ce60bf832bc33013dfd1afde0a666bad0adb56a7c4549312a57e176f064

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