PDF malware analysis — malicious · b4d403b240ca6c27

MALICIOUS

PDF

66.6 KB Created: 2021-01-08 14:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 6f5d1017cecde051ff028036c8eb88c7 SHA-1: 134363e3f496e87c70d3f7226a3eb3ced2d67032 SHA-256: b4d403b240ca6c275a1c742b78dc1fd93f39525bf2a6c2658819fcf6d2cb5fe8

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffnew.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The document body is heavily obfuscated, but the presence of the malicious URI and the high confidence threat detection indicate a phishing or malware delivery attempt.

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/123?utm_term=tea+ball+infuser+target
- https://cdn-cms.f-static.net/uploads/4388827/normal_5fc00650aa3bf.pdf
- https://cdn.sqhk.co/zenetofuma/jbIhcha/29915830189.pdf
- https://cdn.sqhk.co/wixefawoz/dvih3Ky/ferumamimuvidunula.pdf
- https://cdn.sqhk.co/sazalevimit/iCgdQ42/communism_vs_socialism_vs_capitalism.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://s3.amazonaws.com/najubu/applied_behavior_analysis_definition.pdf
- https://uploads.strikinglycdn.com/files/9d48724b-da36-433e-8553-51802b49b1c9/gufemegobujotuze.pdf
- https://uploads.strikinglycdn.com/files/ff613572-a638-4f07-b39e-5ed7d57e5016/shareit_transfer_share_apk_download.pdf
- https://s3.amazonaws.com/julaxel/bepoxukojetavan.pdf
- https://s3.amazonaws.com/tobito/zixunetalorabuzisuzifiru.pdf
- https://uploads.strikinglycdn.com/files/74bfb52d-1beb-4491-908a-b02d163e2092/std_10_gujarati_medium_english_textbook.pdf
- https://s3.amazonaws.com/libosokune/phenol_formaldehyde_resin_manufacturers_in_india.pdf
- https://s3.amazonaws.com/xafaxotaful/konica_minolta_bizhub_c220_spec_sheet.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000becb.bin` `6039f22cbb8b6293e04836c30ed5945b9c0e5de57e89032dc20959dd77a95fb0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBECB	4796 bytes
`font_01_sfnt_off0000cf1d.bin` `36cbadc2554dd9e2c569030d6bacedd96bc7effddeb48e74b0b5df589f15531c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF1D	9572 bytes
`font_02_sfnt_off0000efe7.bin` `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFE7	4324 bytes

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