PDF malware analysis — malicious · 54b4f2f92018bfdc

MALICIOUS

PDF

76.9 KB Created: 2021-09-19 02:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: bbf917a96e24405a6fb6a37c479deeb8 SHA-1: f5b5ff3934c0e1c049c795de0b8d542f481a5c5a SHA-256: 54b4f2f92018bfdc267b78f7c42a7985189e3066868e551af3ada063a644f1ed

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external URIs, many of which are on disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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://smidgel.ru/uplcv?utm_term=toca+lab+apk+download PDF link annotation
- http://www.sctiec.com/up_files/FCK/file/76500612908.pdfIn PDF document text
- http://dreamscar.eu/userfiles/file/62597154924.pdfIn PDF document text
- https://mai-avto.ru/upload_files/file/videxawupilibesuvukax.pdfIn PDF document text
- https://soosekszer.hu/upload/files/waxotetex.pdfIn PDF document text
- http://aodaiminhhanh.com/app/webroot/uploads/files/leredojegivegavorexifuzov.pdfIn PDF document text
- http://pokrowce-ochronne.pl/Upload/file/zikuw.pdfIn PDF document text
- http://beautifulmoda.com/userfiles/files/pifevuzenikisomikafud.pdfIn PDF document text
- https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/gevimuzibilaguzunabe.pdfIn PDF document text
- http://www.superior-inkjet.com/login/ckfinder/userfiles/files/9832016028.pdfIn PDF document text
- https://davaocarrental.com/images/file/56547870125.pdfIn PDF document text
- http://modaxch.com/userfiles/files/97920087951.pdfIn PDF document text
- http://0851gay.org/userfiles/202109file/2021091706200370554.pdfIn PDF document text
- http://federicozucchettiarchitetto.eu/userfiles/files/40595064923.pdfIn PDF document text
- https://livstyle.ro/home/livstyle/public_html/uploads/files/toporadosir.pdfIn PDF document text
- http://twgo8.com/uploads/base/files/202109170543158588.pdfIn PDF document text
- https://tnmkor.com/FileData/ckfinder/files/20210905_44DD2D33DE99D6AD.pdfIn PDF document text
- http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/demiwinojiwiwipeboguz.pdfIn PDF document text
- https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/56701148231.pdfIn PDF document text
- http://zatoodesign.com/userfiles/files/vukevuwemajoxa.pdfIn PDF document text
- https://medsplus.us/admin/images/file/18171458211.pdfIn PDF document text
- https://alarouba.com/ckfinder/userfiles/files/vizufanigirovuwep.pdfIn PDF document text
- http://labonguyenhoang.com/img-chamthi/files/8154040951.pdfIn PDF document text
- https://easyown.ddproperty.com/datas/files/63202890741.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://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_off0000c9c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9C6	10196 bytes
SHA-256: `f2f9fc6f52e0a9383fa1e4defbb863f4464f674c203bfe864c93d3eb98d61f9d`
`font_01_sfnt_off0000e087.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE087	17456 bytes
SHA-256: `20d8f26aaf08430e142a0b3ef98f12ceec7ed44f8917a883cc9e81b8336dcae4`
`font_02_sfnt_off00010df1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DF1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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