PDF malware analysis — malicious · cf75ae76f32ef514

MALICIOUS

PDF

80.2 KB Created: 2021-03-11 23:06:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: ec5368ef589dcd7ca877c13a869637ec SHA-1: ec3c2878cd186c68a32bdb0cad6b83700c720d3f SHA-256: cf75ae76f32ef5142484ba6460d1cf8fe253ae2171a195dbc7e71e6bf75e76cb

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting it's part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to sheet music, designed to trick users into visiting these malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://golowaki.ru/award?keyword=canon+in+d+piano+sheet+music+pdf+easy PDF link annotation
- http://creditreportus.info/35960482471lyno8.pdfIn PDF document text
- https://dawifibikinofi.weebly.com/uploads/1/3/4/6/134682228/d3cdb3129.pdfIn PDF document text
- http://ostanni.fun/196449831407me1w.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4411228/normal_5feec1281cf68.pdfIn PDF document text
- http://figojusu.iblogger.org/59762621086.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379839/normal_602a3d77586a3.pdfIn PDF document text
- https://tizetenu.weebly.com/uploads/1/3/3/9/133999913/jemogov.pdfIn PDF document text
- http://xomerisupudegop.medianewsonline.com/womalodabo.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4386848/normal_5fcdc1a973474.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4479902/normal_6002b63aee124.pdfIn PDF document text
- http://faripofijukevom.mywebcommunity.org/excel_spreadsheet_templates_free.pdfIn PDF document text
- https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/8347911.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412160/normal_603de9221f6ed.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459776/normal_5fe7c99dbb866.pdfIn PDF document text
- http://fupemagis.mywebcommunity.org/arabic_numbers_1_to_100_in_words.pdfIn PDF document text
- https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/ac1c20db1b.pdfIn PDF document text
- http://dutov.org/railway_aptitude_test_book_freezn4jg.pdfIn PDF document text
- http://lalat.space/wufinivimipexarobikudttkb6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4469849/normal_6023708e0797c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4374703/normal_5ff9bf512508f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393362/normal_601d22c20fef8.pdfIn PDF document text
- http://naturapple.space/ocarina_of_time_ocarina_songs_sheet_music6at3j.pdfIn PDF document text
- http://zizowifajazabor.22web.org/203368445.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://vusizudufekope.epizy.com/nokukemufopadejof.pdfIn PDF document text
- http://xinirujoki.epizy.com/cheque_requisition_form_template.pdfIn PDF document text
- http://sipanokule.onlinewebshop.net/the_further_adventures_of_sherlock_holmes_books_list.pdfIn PDF document text
- http://rarifefivafew.epizy.com/tuloxafudoxepik.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_off0000fc6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC6E	5276 bytes
SHA-256: `a9d842c8c33e78c984cb12cf756d2d64c7ca4140499cc6a9955db2a04e295544`
`font_01_sfnt_off00010e48.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E48	10764 bytes
SHA-256: `1332a013aa73a5171c90e2dfb46f77323ef2432451c5113ffda018091ce29589`

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