Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c054dc6e1c46e5e…

MALICIOUS

PDF

74.9 KB Created: 2021-01-21 02:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0ec324ea11140000778a2f4c4151188e SHA-1: 15ba47440dd643f9d85d421fa8cb7b418f3c6b06 SHA-256: 1c054dc6e1c46e5e979d7f9453f645f037b4ed48fb0fc31137700a65972b7c31
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI, 'https://trafffe.ru/123?utm_term=ti+84+plus+silver+edition+used', was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a 'Ti 84 plus silver edition', likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffe.ru/123?utm_term=ti+84+plus+silver+edition+used PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454673/normal_5feb95ec28d50.pdfIn PDF document text
    • https://cdn.sqhk.co/tokititagiwe/giiahbp/52420491667.pdfIn PDF document text
    • https://cdn.sqhk.co/litopozuf/ibHjfig/33124652722.pdfIn PDF document text
    • https://site-1175775.mozfiles.com/files/1175775/26544243875.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/J4giugd/69192190379.pdfIn PDF document text
    • https://cdn.sqhk.co/junulevi/jdOgcig/pojagajalower.pdfIn PDF document text
    • https://site-1179462.mozfiles.com/files/1179462/pawijukajupegefuz.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/ibSPSxm/joplin_mo_zip_code_map.pdfIn PDF document text
    • https://cdn.sqhk.co/sopaluwokaja/ufRgcOw/15116073726.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/4YYGjdX/digicel_call_international_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fitigeru/jdiahcd/tonegalejugobazi.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/ejjjjjc/monster_hunter_clicker_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/vegubefeno/fi96Vib/rider_strong_age_16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/womirofop/12066781253.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/bitlocker_free_for_pc.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_off0000e61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61A 5036 bytes
SHA-256: 5d671b09fc8fb4409af874f23261297c27f7e60d9a9a538ad8b8d875a54e46a6
font_01_sfnt_off0000f75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75A 11496 bytes
SHA-256: d2369cc8ce0bfaa37abfa379cc28969a9ab7f14f7549b4f436a32fc1ee742c36