PDF malware analysis — malicious · 9cef6b413dd99864

MALICIOUS

PDF

69.9 KB Created: 2020-12-28 10:16:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: aeb48b96ce2e8c765ca79c917bd2e353 SHA-1: 57cef317f1795769aaa9bf75da91c643dcd32484 SHA-256: 9cef6b413dd998649f7b0f9548ecab7d71d482a967dfb23e0ac009e5a3a36d71

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to 'traffnew.ru', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a context related to a 'digital school bell system', likely a lure.

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://traffnew.ru/strik?utm_term=digital+school+bell+system PDF link annotation
- https://cdn-cms.f-static.net/uploads/4447914/normal_5fa487112cd85.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372072/normal_5fa82b785fdb1.pdfIn PDF document text
- https://cdn.sqhk.co/jevipugirofi/iRFjhgd/boysen_color_chart.pdfIn PDF document text
- https://cdn.sqhk.co/zowipitilo/4nPcaic/17048819422.pdfIn PDF document text
- https://cdn.sqhk.co/soredepel/ejhgdjb/flower_garden_acnh_ideas.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/vigevot/volesuwatifikadixaninuje.pdfIn PDF document text
- https://s3.amazonaws.com/piradi/dibesexasolilu.pdfIn PDF document text
- https://s3.amazonaws.com/rimepusox/beat_maker_app_for_pc.pdfIn PDF document text
- https://s3.amazonaws.com/lulelepese/64163456696.pdfIn PDF document text
- https://s3.amazonaws.com/muwomapotumugi/synergies_mod_v._1337.pdfIn PDF document text
- https://s3.amazonaws.com/wiwuxot/51149740952.pdfIn PDF document text
- https://s3.amazonaws.com/mudurixo/facts_on_file.pdfIn PDF document text
- https://s3.amazonaws.com/sivanira/presentation_skills_powerpoint.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d332.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD332	5356 bytes
SHA-256: `cde5e7e5fb83aa2751adc55b55fca66c68e8e015cfdd87bb3ee12937e654c785`
`font_01_sfnt_off0000e55c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE55C	11112 bytes
SHA-256: `9707b814c74bd8664ebc74279c2fe520da21df27a4333b6982ecfeee4fea5b39`

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