PDF malware analysis — malicious · 58644f85a489fc52

MALICIOUS

PDF

85.3 KB Created: 2021-02-22 03:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: fbefc9a3928a2e44aa4488ff7cfa4198 SHA-1: 39edb1656017e5e5b75d7e41dc7a063e0191e7e5 SHA-256: 58644f85a489fc52890764942e743cfb7f935b20efda46ec8aaa71bddfc9d67c

254 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF document exhibits malicious behavior by hosting a link farm and a redirector to known malicious infrastructure. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content is designed to trick users into installing software, likely to facilitate further compromise. The embedded URL 'https://yafferge.ru/wix?keyword=free+adblocker+browser+apk+full+indir' is a primary indicator of this malicious intent, potentially leading to malware download or phishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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://yafferge.ru/wix?keyword=free+adblocker+browser+apk+full+indir In PDF document text
- https://static.s123-cdn-static.com/uploads/4451225/normal_5fe389aa58c64.pdfIn PDF document text
- https://cdn.sqhk.co/dilizilozok/1hbJjbn/80th_birthday_decoration_ideas_for_mom.pdfIn PDF document text
- https://jokiwaxe.weebly.com/uploads/1/3/2/7/132740814/c79ce0c2846a.pdfIn PDF document text
- https://rovagurepuj.weebly.com/uploads/1/3/1/8/131856033/996317.pdfIn PDF document text
- https://kajugomurabamuj.weebly.com/uploads/1/3/0/8/130814292/girasujasafelure.pdfIn PDF document text
- https://sepafolelobonel.weebly.com/uploads/1/3/4/6/134614676/zumodezib.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486034/normal_6023925860dac.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500889/normal_6018d401d2c92.pdfIn PDF document text
- https://cdn.sqhk.co/goronikel/eI4ZDOX/46490536637.pdfIn PDF document text
- https://vuzipelafow.weebly.com/uploads/1/3/4/6/134688966/rugaj.pdfIn PDF document text
- https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/7072644.pdfIn PDF document text
- https://cdn.sqhk.co/xawodoze/hehigdW/resident_evil_7_characters.pdfIn PDF document text
- https://biwamuneluzotip.weebly.com/uploads/1/3/2/6/132696598/3239112.pdfIn PDF document text
- https://welomutulek.weebly.com/uploads/1/3/4/8/134873792/5367976.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/fixararololu/nelabigetofoxixufut.pdfIn PDF document text
- https://s3.amazonaws.com/bezutu/xatajataxofidanuve.pdfIn PDF document text
- https://s3.amazonaws.com/kulinisokakewi/bedtime_stories_movie_cast.pdfIn PDF document text
- https://s3.amazonaws.com/jowutoneranemuk/9450960137.pdfIn PDF document text
- https://s3.amazonaws.com/sepawi/guided_reading_level_conversion_lexile.pdfIn PDF document text
- https://s3.amazonaws.com/baxekojojexusol/kannada_love_feeling_songs_ringtone.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f1c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1C6	5400 bytes
SHA-256: `f5f162b89b286ba3e45d30de2ca8fdce41f264cd2db319da08a7c1b38d323761`
`font_01_sfnt_off00010441.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10441	14744 bytes
SHA-256: `00ac899ea871a44d36e558badee21dc99fa05dd681e51b5018d6f15155e15715`
`font_02_sfnt_off0001322a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1322A	16212 bytes
SHA-256: `8a3f0ee7cdf1a8b2f03591087c4b5066f7cdf2960448dc94a939c7268e8c4012`

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