Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ffa3b7a38b53f1…

MALICIOUS

PDF

53.9 KB Created: 2020-12-21 11:19:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 047299904de3e143c86f6aee0880488e SHA-1: 256434e67d38f4b78fffd886358829ba68478136 SHA-256: 89ffa3b7a38b53f14abc6302ed77fc79721cb3098e68415758783b65bd6741d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML_NYX_PDF_MALICIOUS and ClamAV detections further support its malicious nature. The embedded URLs likely lead to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9223

Heuristics 4

  • 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.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/wb?keyword=rooms%20the%20toymaker
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/4117077.pdf
    • https://butiziro.weebly.com/uploads/1/3/4/3/134308177/fiwasiromuzoxaz_lutimirovorari_worib_wezuzokal.pdf
    • https://tenimevu.weebly.com/uploads/1/3/4/3/134315692/d8a3c9d.pdf
    • https://rakositove.weebly.com/uploads/1/3/4/5/134595637/gusuxazosapezed.pdf
    • https://vofadifop.weebly.com/uploads/1/3/4/5/134580142/nafufil.pdf
    • https://rugitaroginuwim.weebly.com/uploads/1/3/4/7/134768051/51b14.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fce3bf4e1a8af6ff4b0530e/t/5fd61d529264095525cb3abe/1607867731391/tamilrockers_tamil_movies_2017_hd.pdf
    • https://s3.amazonaws.com/poguvelefa/birds_name_in_english.pdf
    • https://s3.amazonaws.com/mamibis/apa_format_reference_multiple_authors.pdf
    • https://s3.amazonaws.com/tiduro/vovidogidumi.pdf
    • https://s3.amazonaws.com/xalexojaxipud/gofreetech_wildfire_k-001_manual.pdf
    • https://s3.amazonaws.com/lolaritemukole/decimal_division_worksheet_grade_6.pdf
    • https://s3.amazonaws.com/wixatax/reading_articles_in_english.pdf
    • https://static1.squarespace.com/static/5fdcb80a4f759b768e16b9b4/t/5fdcd5414469cd20aa0ee2ca/1608308034748/adobe_spark_post_pro_mod_apk.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc0a.bin
e097010b5d268056bb2e5b4a790a1a2445c59e6348ded7fc921fd74920d65e17		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0A 4948 bytes

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