Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a61ce45fea5c35c…

MALICIOUS

PDF

69.2 KB Created: 2020-12-28 13:54:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7ef819bb02061ba34e0ce3427e1de07 SHA-1: 4defda5517dbe5b2041ffbdadf61d92255fb3c90 SHA-256: 9a61ce45fea5c35c604f3d5f3c7903a8e4d49ebc8d226fab7267c249fc5a19e9
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by multiple heuristics and a machine learning classifier. It contains an embedded URL, https://traffnew.ru/strik?utm_term=recharge+it+now+idea, which is likely part of a phishing or malware distribution scheme. The document's metadata and body text appear to be obfuscated or corrupted, but the presence of the malicious URL and the high risk score strongly indicate a phishing attempt.

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=recharge+it+now+idea
    • https://cdn-cms.f-static.net/uploads/4443815/normal_5fb4a1da52c14.pdf
    • https://cdn.sqhk.co/vopufepivipe/jcgdie5/sleep_sounds_free_relax_music_white_noise_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4446286/normal_5fc4e081c460c.pdf
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5fd15775425c5.pdf
    • https://cdn-cms.f-static.net/uploads/4378618/normal_5fbddb16b359d.pdf
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5fa4f2f126515.pdf
    • https://cdn.sqhk.co/jekefebiba/1gficid/92122961261.pdf
    • https://static.s123-cdn-static.com/uploads/4369329/normal_5fc9b6f1de3ee.pdf
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5fd36a3283185.pdf
    • https://cdn-cms.f-static.net/uploads/4381321/normal_5f9f90f75f1cb.pdf
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f874a6a8d743.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8b31d607-c056-4ac0-9002-8320a13e56f8/davies_high_school_phone_number.pdf
    • https://uploads.strikinglycdn.com/files/93844c6b-522c-4719-acb6-e48d65b97721/bose_soundsport_ios.pdf
    • https://uploads.strikinglycdn.com/files/499b0849-9bbb-42ac-8d54-ae51b723e8b1/business_insider_stock_futures.pdf
    • https://uploads.strikinglycdn.com/files/8267a026-99ff-45ce-9d22-eef4b3614cd4/suduzom.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_off0000d325.bin
77843f68fef54cfdb954892bdd3d7c691d078da20ec324dbdef8fe1058ff9555
pdf-font-stream PDF embedded font (sfnt) at offset 0xD325 5088 bytes
font_01_sfnt_off0000e480.bin
d21a71b990b2c692a94d6c615a89215888f8e978dd2e8b241ff553e4987c5ded
pdf-font-stream PDF embedded font (sfnt) at offset 0xE480 10440 bytes