Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61f6fdb52ed4a00…

MALICIOUS

PDF

66.5 KB Created: 2020-11-22 03:04:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6db6c51221d882a27b36573656130f52 SHA-1: e7dcf7b3835e5391652dc5086e7f315f1fbcd7d4 SHA-256: e61f6fdb52ed4a007385d8267ce20f5e0b9c97f62a990f29681e36dccbd3c41e
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier. It contains an embedded URI pointing to 'https://trafficel.ru/aws?utm_term=digimon+world+1+digivolution+guide', which is likely used for phishing or to download a secondary payload. The document body is heavily obfuscated, but the presence of the external URI suggests a malicious intent to redirect the user to a potentially harmful site.

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://trafficel.ru/aws?utm_term=digimon+world+1+digivolution+guide
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f9337000d996.pdf
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f89712f230d7.pdf
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5f90499ab93ca.pdf
    • https://cdn-cms.f-static.net/uploads/4406168/normal_5fa5f2b510e59.pdf
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5fae12c5600bd.pdf
    • https://cdn-cms.f-static.net/uploads/4369935/normal_5f8d1dfbd6dfa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4311ae75-0a14-4a88-99cd-f953d53e5da7/85491061622.pdf
    • https://uploads.strikinglycdn.com/files/5c6999ce-c72c-4c1c-9af4-17a220ee7b7e/ocean_11_scene.pdf
    • https://uploads.strikinglycdn.com/files/9d93ae3b-33d4-4c13-a365-ecc5738aa847/sozenewiginiguxesomafini.pdf
    • https://uploads.strikinglycdn.com/files/4b6674df-dfb4-4262-863c-30fcd4096a12/cotton_wool_spots_vs_drusen.pdf
    • https://uploads.strikinglycdn.com/files/7c048fe5-1b89-4be2-b5a2-8979203f9c66/potepamowegifinexom.pdf
    • https://uploads.strikinglycdn.com/files/5a2363ab-1b85-422d-8110-15954079e2d1/chapter_25_paired_samples_and_blocks_answers.pdf
    • https://uploads.strikinglycdn.com/files/5249739b-b105-44f1-96fb-e990403d295c/nebogi.pdf
    • https://uploads.strikinglycdn.com/files/60b947dd-77e7-4317-8e3a-6835ab940446/javawefez.pdf
    • https://uploads.strikinglycdn.com/files/934ca635-130d-456e-83bd-aac16ad14b24/90337639209.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_off0000c786.bin
fb23d864dd4f6071a84a69c21933e221d4cbf3b6e84a4af2b2b93b9c385fe64a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC786 4960 bytes
font_01_sfnt_off0000d86d.bin
a74fd2aa55fdafa8e80001c06939eaebd25cd2717f160a71bf10ae6843fa4de7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD86D 11428 bytes