PDF malware analysis — malicious · 8d733677d50d166a

MALICIOUS

PDF

69.1 KB Created: 2021-09-26 02:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 2e60cbdde07c90e64b6d7e8c61824cc4 SHA-1: 071c6f6fd722761d445a79fd99a16002e1b418ea SHA-256: 8d733677d50d166af1ce28a86c7da7fac06f662bee204cd75cea160e1b90ae55

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains embedded JavaScript, which is often used to execute malicious actions or redirect users. The PDF also functions as a link farm, pointing to numerous unknown URLs, many of which host PDF files, suggesting a chain of redirection likely intended to obscure the final malicious destination.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

Heuristics 6

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://steammining.com/userfiles/file/70822968637.pdf In PDF document text
- https://abouelhoulgroup.com/userfiles/files/98062839305.pdfIn PDF document text
- http://dintainoodle.com/uploads/files/28215531838.pdfIn PDF document text
- http://kuryakyn.ru/userfiles/file/99182458311.pdfIn PDF document text
- https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16143093186944---gogatafakivobexojin.pdfIn PDF document text
- http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/joxiwuwom.pdfIn PDF document text
- https://jaukiaplinka.lt/ckfinder/userfiles/files/25433122298.pdfIn PDF document text
- http://veterina-naslunci.cz/userfiles/file/98155997788.pdfIn PDF document text
- http://atem.sciara.eu/public/upload/file/xudutub.pdfIn PDF document text
- http://benedictinoselrosal.org/ckfinder/userfiles/files/ridupevukoba.pdfIn PDF document text
- http://esangsok.com/upfile/files/4671958716.pdfIn PDF document text
- https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/93028935987.pdfIn PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c974ae9df1---84539027442.pdfIn PDF document text
- https://hrmconsulting.biz/upload/files/gorunefesonitarelu.pdfIn PDF document text
- http://ipsaix.com/ckeditor/ckfinder/userfiles/files/53684099159.pdfIn PDF document text
- http://graciaindoutama.com/kingkong/userfiles/files/xamufaralebutetapipona.pdfIn PDF document text
- http://ilkemymm.com/image/files/davezusalekinelar.pdfIn PDF document text
- http://hosungtour.net/FileData/ckfinder/files/20210913_574530AB7319B1A4.pdfIn PDF document text
- https://anglarill.net/userfiles/file/14355682748.pdfIn PDF document text
- http://porpora.eu/imagenes/imagenes_contenidos///zixekelovekowar.pdfIn PDF document text
- http://kino-cosmik.ru/sadm_files/24018105743.pdfIn PDF document text
- http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/60639406716.pdfIn PDF document text
- http://dubilex.com/userfiles/files/23458506325.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=next+launcher+appPDF link annotation
- 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_off0000af7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAF7F	15860 bytes
SHA-256: `d78258f0a9aff2b7eef442b1183909ab894bba31eb25aca4639ede3a9b120c38`
`font_01_sfnt_off0000d81f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD81F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f036.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF036	10272 bytes
SHA-256: `ff3ee582b2191179a9a04851b5689d32cad5cb967732a5e03ec9ab3a15835919`

Open this report in the interactive analyzer, or submit your own file for analysis.