Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e933f6b0a2da94…

MALICIOUS

PDF

80.2 KB Created: 2021-05-19 21:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a91027d41c6c9b6866d1e5f8eaf469c6 SHA-1: 304c0084c5692bbb1a302bfa0f549c8b4aa1178f SHA-256: 56e933f6b0a2da94035783436db0d4dba300546039da0524ffcca494abdc4096
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which points to a Google feed proxy, suggesting a potential lure to a phishing site. While the document body is heavily obfuscated, the presence of embedded URLs and the overall detection verdict strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://static.s123-cdn-static.com/uploads/4401505/normal_6005cb3babfaa.pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4448339/normal_6001e328d833a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375199/normal_5fecbf3e9c3cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446490/normal_5fe4b4f950183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_60478726c34a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497658/normal_5fdbe26db642c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/mO-5lVq97NI/wb?keyword=how%20to%20choose%20living%20room%20rug%20colorPDF link annotation
    • https://s3.amazonaws.com/rodakarugupoko/what_techniques_do_therapists_use.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/bacterial_meningitis_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/how_to_do_cardio_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/28336854745.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/tadamerogeluvis.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/netgear_prosafe_gs108t_default_ip.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/does_ust_law_accept_transferees.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/autodesk_inventor_2017_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/jobatojatimekim.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/bharat_petroleum_dealership_application_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/razota.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/cytology_pap_smear_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/15695045729.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/ringtones_song_app_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC69 5116 bytes
SHA-256: af544a08efa84c98b92dadd1bab892e55829d0853b7639a73a4ad2b6cba921b3
font_01_sfnt_off00010dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC1 10488 bytes
SHA-256: 9459ba7bec5098dfbab1c005e02e284f696db0550427b114e6f6e4c51e1ddf84

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