Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aafc5ac2e2b5997…

MALICIOUS

PDF

77.7 KB Created: 2021-03-03 23:12:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 53e2b669d49005f503a779fc2b7ecc3f SHA-1: 2ef2715db807ac8e457d3c3028dc0aa3f6cb9ed6 SHA-256: 0aafc5ac2e2b59979bae05076af4577f3b09c7e25ef2e20ebee32d254cf3f8c0
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=layers+of+the+earth+project+ideas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406481/normal_5fe92afaac9dc.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/xdHZmhc/dikon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467945/normal_6034df0b482e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447258/normal_5fc6d9fb99ba9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423154/normal_6001837ac165d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455642/normal_602beb2e81090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416513/normal_6003f612e9eba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wukara/cambodian_history.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/fafozokenoxixexubad.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/vukufi.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/lyrics_7_years_lukas_graham_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/lepurafu.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/autocad_2d_sofa_blocks_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE771 5012 bytes
SHA-256: 38042993f1b98b3ea08fad459c026841c751080ce91c1a929361bfc57e14dcb2
font_01_sfnt_off0000f8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A8 10104 bytes
SHA-256: cd92a198f8d1179c471bfd208eec82835893e1a7f183fc914cc1e19e8ec1ea81
font_02_sfnt_off00011b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34