Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f1986d6a3dc0e2…

MALICIOUS

PDF

81.0 KB Created: 2021-03-15 12:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 346a5768e77baa3de84bdbdaf29666c8 SHA-1: b3f28929a42c9daaa62e915d5aa03d72849ec817 SHA-256: f7f1986d6a3dc0e2d0c234fe83a2ac3c3d4419b910210941742d35eea9d44dba
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'nipisod.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Whatsapp for nokia 3310 dual sim', a common tactic for phishing campaigns.

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://nipisod.ru/123?utm_term=whatsapp+for+nokia+3310+dual+sim
    • https://cdn-cms.f-static.net/uploads/4503987/normal_6041803e27179.pdf
    • https://static.s123-cdn-static.com/uploads/4476140/normal_5ff685891c0ac.pdf
    • https://static.s123-cdn-static.com/uploads/4426080/normal_5ff6215edb40e.pdf
    • https://cdn-cms.f-static.net/uploads/4382201/normal_60425ee594a17.pdf
    • https://cdn-cms.f-static.net/uploads/4481663/normal_5fd6624e3032d.pdf
    • https://cdn-cms.f-static.net/uploads/4453560/normal_601233266d052.pdf
    • https://cdn-cms.f-static.net/uploads/4415767/normal_5fe9c908315ce.pdf
    • https://static.s123-cdn-static.com/uploads/4365612/normal_5ffb18e3ab22a.pdf
    • https://cdn-cms.f-static.net/uploads/4370529/normal_6030ff31c3dad.pdf
    • https://cdn-cms.f-static.net/uploads/4371020/normal_603a2d5a56cb7.pdf
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5fd92d71e0c1d.pdf
    • https://static.s123-cdn-static.com/uploads/4470223/normal_5fccebe82cc77.pdf
    • https://cdn-cms.f-static.net/uploads/4415046/normal_603727262132c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dikomavomem/dewalt_oscillating_tool_guide.pdf
    • https://s3.amazonaws.com/rexogeguxosix/how_to_install_laminate_kitchen_countertop_sheet.pdf
    • https://s3.amazonaws.com/bejenosugede/king_bolete_look_alikes.pdf
    • https://s3.amazonaws.com/supefujoxopubu/4346772870.pdf
    • https://s3.amazonaws.com/fajeloninesitel/how_to_reset_your_brother_sewing_machine.pdf
    • https://s3.amazonaws.com/kugelilizibuwum/basak.pdf
    • https://s3.amazonaws.com/bojafazes/vexotururubosi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe99.bin
575120e111b7a94577d63def1aa0f3a287b93ad0199a7d2d16e6e7473047e234
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE99 5716 bytes
font_01_sfnt_off000111fd.bin
8e66070babccfb5039a76a3d274e0d01d774990426ac42552bc9ace148cba9de
pdf-font-stream PDF embedded font (sfnt) at offset 0x111FD 10976 bytes