PDF malware analysis — malicious · aff0ae69fd1f47d2

MALICIOUS

PDF

80.9 KB Created: 2021-09-15 18:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: d513de93b295af2745f3e2c2ce54f9b2 SHA-1: 6e67b1d1c968c9736bba129599c38b21ac65f7da SHA-256: aff0ae69fd1f47d26e9f4f44a196557cb990b28fc62955948a08d742fa0c4b5c

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=android+disable+keyboard+suggestions PDF link annotation
- https://samsungvrvklima.com/upload/ckfinder/files/34707808389.pdfIn PDF document text
- http://erpos.sk/data/files/73006336236.pdfIn PDF document text
- http://www.accl-calibration.com/login/ckfinder/userfiles/files/25331277174.pdfIn PDF document text
- http://ktcz.eu/files/files/22524702216.pdfIn PDF document text
- https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/g8vvn02rvfur146040bunhkhk9/lamisakewovamosat.pdfIn PDF document text
- https://milsagliksen.org/upload/ckfinder/files/wuximajis.pdfIn PDF document text
- http://donghobaoan.com/uploads/files/69542753993.pdfIn PDF document text
- https://gonguyenkhoi.vn/upload/files/80485859760.pdfIn PDF document text
- http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/2f41id5p2mr6ru4b6ovbc9tg47/47239379196.pdfIn PDF document text
- https://rt-totaalafbouw.nl/userfiles/file/nilufivegaregelatidajibik.pdfIn PDF document text
- http://www.museopizarra.com/ckfinder/userfiles/files/3168529366.pdfIn PDF document text
- http://devitohomesorlando.com/userfiles/files/nagugolutodojosidadapapup.pdfIn PDF document text
- https://yuktogel.com/contents/files/danosafobawugizivigugesis.pdfIn PDF document text
- http://meetburgerusa.com/uploads/files/ribuxuzizisogevawalekub.pdfIn PDF document text
- https://hospvetcentral.pt/site/upload/file/27112449607.pdfIn PDF document text
- http://france-ex.com/images/blog/file/barusiwegozo.pdfIn PDF document text
- http://inter-travel.hu/_user/file/28491224375.pdfIn PDF document text
- http://architetturaurbanistica.it/userfiles/files/pulekidununojexa.pdfIn PDF document text
- http://snp-ent.com/files/fckeditor/file/195368356613c13d482586.pdfIn PDF document text
- http://www.fashiongale.ro/userfiles/files/wupoz.pdfIn PDF document text
- http://www.juniorcollege.cl/ckfinder/userfiles/files/maxiretitixodobuxawasedef.pdfIn PDF document text
- http://clingac.es/d/files/54437734422.pdfIn PDF document text
- https://advance-pack.com/editor_upload/file/52410707902.pdfIn PDF document text
- https://doan295doson.vn/namthuan/images/news/files/72619283046.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_off0000d634.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD634	17852 bytes
SHA-256: `0a594ef4491886900f06ed6f5ee47c35e6516d98b2537fa11f6d7f373f27fd81`
`font_01_sfnt_off00010470.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10470	10852 bytes
SHA-256: `f2bdefa062a182ae439471eae142db97bc8dbe0e15300f02195e23fc1b3657fc`
`font_02_sfnt_off00011d75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D75	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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