PDF malware analysis — malicious · 8a4f28c49a6293b2

MALICIOUS

PDF

75.8 KB Created: 2020-12-26 09:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 6fa3a42b79db716a69a886cc04ddc9e0 SHA-1: 67010c9533bf81f8711106e9b0638777e80a6323 SHA-256: 8a4f28c49a6293b2a972ef0d027cae195155f1eb530791a97a6275a8d27df541

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, appears to be a lure related to a recipe, which is a common tactic for phishing or malware delivery via spearphishing attachments.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

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://trafffi.ru/strik?utm_term=cowboy+caviar+dip+with+sour+cream PDF link annotation
- https://malugerimume.weebly.com/uploads/1/3/4/8/134846891/puzimupijutaneg.pdfIn PDF document text
- https://cdn.sqhk.co/kurinunuwor/hdgjDrR/57491639905.pdfIn PDF document text
- https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/47e9c51ae124a.pdfIn PDF document text
- https://jerezuwiwufuken.weebly.com/uploads/1/3/4/3/134355676/ac0a09781f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476135/normal_5fd351832a726.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4464852/normal_5fe5dd9da81aa.pdfIn PDF document text
- https://ligexomapaku.weebly.com/uploads/1/3/4/3/134321337/temoka_favafof_mulosexegos_samukewi.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/bidemewufa/platform_revolution_summary.pdfIn PDF document text
- https://s3.amazonaws.com/jitimesolagun/south_carolina_dmv_form_dl_222.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dcd5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCD5	5476 bytes
SHA-256: `8e9114e50573bbf6fdd4cb4c23b682c9160db8de636373a2d5faffac1fd2f9b5`
`font_01_sfnt_off0000ef8d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF8D	10860 bytes
SHA-256: `478e4fde13f49c42743077b87c98f4888daa1308974ab1273281b553782af5d1`
`font_02_sfnt_off00011483.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11483	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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