Malicious PDF — malware analysis report

Static analysis result for SHA-256 06be4565d832f9f9…

MALICIOUS

PDF

64.4 KB Created: 2020-12-07 01:13:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96d5db002120bf6237e55ef15e436b46 SHA-1: dfc9ecacc14966e0b9bd4135f0bbc2e533e6b0e0 SHA-256: 06be4565d832f9f9eb2da4133652811149f4d3cab23ae922f992ba49fe7ec631
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or delivering further malicious content. The document body, though heavily obfuscated, suggests a lure related to a 'drastic way to diet math worksheet', aiming to trick users into visiting the external URL.

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://traffnew.ru/strik?utm_term=a+drastic+way+to+diet+math+worksheet
    • https://cdn-cms.f-static.net/uploads/4423154/normal_5fbbe6fcaa1da.pdf
    • https://cdn-cms.f-static.net/uploads/4377706/normal_5fa592d965ccc.pdf
    • https://cdn-cms.f-static.net/uploads/4409818/normal_5f9f037e01171.pdf
    • https://cdn-cms.f-static.net/uploads/4387825/normal_5f9348603e48a.pdf
    • https://static.s123-cdn-static.com/uploads/4443292/normal_5fcd59dc6e01c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fewifuwu/prophylaxis_anticoagulation_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/bcb29671-d749-4980-994d-a887cb8d7e82/afinador_de_bajo_sexto_para_android.pdf
    • https://uploads.strikinglycdn.com/files/7c22bf30-94d4-41c3-a3f1-1358c05811a5/zijusukedeziradikadipo.pdf
    • https://uploads.strikinglycdn.com/files/61eef87a-113d-45a5-8c8e-2cc875b850bb/the_scary_maze_game_2_unblocked.pdf
    • https://uploads.strikinglycdn.com/files/03a406b6-d3b9-4e65-a07e-d55e7b369c21/gelimofagifigovere.pdf
    • https://uploads.strikinglycdn.com/files/fb3be4c6-a3d6-4259-8be3-3c6c09664fc6/morning_glories_comic_cancelled.pdf
    • https://s3.amazonaws.com/kepevipawit/kenmore_dishwasher_13543_installation_guide.pdf
    • https://s3.amazonaws.com/jamokaroxoj/23664332687.pdf
    • https://s3.amazonaws.com/wuzalugiseto/kupinuneraxax.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4a9.bin
b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A9 2900 bytes
font_01_sfnt_off0000beec.bin
cff0cdf5a702ac219b2cc50a2265c263d511f994190553672826792f5ac7e1c4
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEC 5396 bytes
font_02_sfnt_off0000d129.bin
b329f2ce034c90a5901a9b0a20f64b36d1fccf89c997ea3f0dbe6a89df534e0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD129 10456 bytes