PDF malware analysis — malicious · 02df4c0eb617d2fc

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 12:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: b127352d49db027d93015695ab6182d8 SHA-1: bc05ee9b01cffb1c3fc7c364b9e1e12b9495602e SHA-256: 02df4c0eb617d2fcb692b0051ed1b822b94316b9bf0ed83a6190d3a55e346229

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The embedded document body is heavily obfuscated and unreadable, providing no direct clues to the specific lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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://huntic.ru/uplcv?utm_term=geometric+shapes+in+real+life PDF link annotation
- https://ermolino.mebel18.com/uploads/files/8674482634.pdfIn PDF document text
- http://take114.kr/FileData/ckfinder/files/20210910_F1DFAF9203F0A8CD.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161324d8af03b2---87845218854.pdfIn PDF document text
- http://studioingegneramato.com/userfiles/files/79428039629.pdfIn PDF document text
- https://atkarisuli.hu/userfiles/file/texumitolivat.pdfIn PDF document text
- https://stockbauer.hu/uploads/file/miwewatutisedufanik.pdfIn PDF document text
- http://tuderprogettazione.it/userfiles/files/78965178304.pdfIn PDF document text
- https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/22758960585.pdfIn PDF document text
- http://alessandrobelleseveterinario.eu/userfiles/files/dumatorozojabage.pdfIn PDF document text
- http://paolacaone.eu/userfiles/files/93709533212.pdfIn PDF document text
- https://mi-stores.com/basketballtotaal/images/editor/file/zoxubigomutolazezijizapu.pdfIn PDF document text
- https://asmitahrgroup.com/ckfinder/userfiles/files/14106943295.pdfIn PDF document text
- http://dagmar-e.de/userfiles/file/xewexo.pdfIn PDF document text
- https://tradegateindia.com/userfiles/file/61434540451.pdfIn PDF document text
- http://gyuco.com/uploadfile/files/20210913_010808.pdfIn PDF document text
- https://kamarkosong.com/contents/files/tazisud.pdfIn PDF document text
- https://bedandbreakfastholten.nl/userfiles/file/dilopotela.pdfIn PDF document text
- http://ever-pioneer.com/upload/files/dijowoguvev.pdfIn PDF document text
- http://davidhammerstein.org/ckfinder/userfiles/files/mewoxekevivunijomibusax.pdfIn PDF document text
- http://dd-eng.com/files/files/3396232794.pdfIn PDF document text
- https://indiachristian.org/uploads/files/76942988283.pdfIn PDF document text
- http://northcity.rs/slike/files/kututetoseriwo.pdfIn PDF document text
- http://sherwoodchambergolf.com/ckfinder/userfiles/files/18317122184.pdfIn PDF document text
- http://nhuaduongnhapkhauaz.com/upload/files/tewodenapudusukeza.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_off0000e319.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE319	16940 bytes
SHA-256: `daeafc56c5f7d3f0221988ba8bfbee7130de206a52cbd30b1a76a8b5bf4c708d`
`font_01_sfnt_off00010ed3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10ED3	10784 bytes
SHA-256: `e272eccffabb03000e6003665924c74d8126d2b63afc98a807f5ebee93042bd3`
`font_02_sfnt_off00012780.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12780	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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