PDF malware analysis — malicious · 3260a6247fe80a2b

MALICIOUS

PDF

79.3 KB Created: 2021-09-17 05:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 89d6acea601ecf2a1b29413671367955 SHA-1: edf1dc307b736299f4e4d8ba460deedfc12c2ed7 SHA-256: 3260a6247fe80a2b1654d5e360161aae488b00a3bc04838b80c5306738cc62e3

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a phishing lure by presenting a fake CAPTCHA. The embedded URLs, such as 'https://archism.ru/uplcv?utm_term=pokemon+yellow+apk+for+android+free+download', suggest an attempt to redirect users to download potentially harmful content. While no scripts were directly extracted, the PDF structure and heuristics indicate it's designed to exploit user interaction, likely leading to further malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9968

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
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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://archism.ru/uplcv?utm_term=pokemon+yellow+apk+for+android+free+download PDF link annotation
- https://keralatemples.info/ckfinder/userfiles/files/wupineboj.pdfIn PDF document text
- https://loyalangkorapartment.com/userfiles/file/fezudatutis.pdfIn PDF document text
- https://cytairtool.com/test/userfiles/file/20210917_aa7d0.pdfIn PDF document text
- http://www.maderas-navarro.com/ckfinder/userfiles/files/93022152266.pdfIn PDF document text
- http://insei.eu/userfiles/files/29713315369.pdfIn PDF document text
- http://vivaldiskibus.com/FileData/ckfinder/files/20210916_9855561469F8BCDA.pdfIn PDF document text
- http://satisfytech.com/ck/upload/files/98055531799.pdfIn PDF document text
- http://pogotowienaukowe.com/Upload/file/85233070541.pdfIn PDF document text
- https://sthouseluxury.com/upload/files/31278516229.pdfIn PDF document text
- http://psychanalyste-gard.fr/ckfinder/userfiles/files/13131010604.pdfIn PDF document text
- https://cooperadora.grupocreartel.com/documentos/archivos/gilofase.pdfIn PDF document text
- https://www.piramideidiomas.com/ckfinder/userfiles/files/muvazada.pdfIn PDF document text
- http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b86e8027bf---semipokajawogofojole.pdfIn PDF document text
- https://htlexpress.com/ckfinder/userfiles/files/dawotabekozutuxitobug.pdfIn PDF document text
- http://dxczx.com/ckfinder/userfiles/files/20210907_031949.pdfIn PDF document text
- https://k31szmq42-nu28.com/contents/files/mupeturilumekan.pdfIn PDF document text
- http://freewest.at/ripikoxotowukemitasaru.pdfIn PDF document text
- https://egyptsuntours.com/userfiles/files/jazodewizatugawuf.pdfIn PDF document text
- http://arcstema.com/userfiles/files/83436533573.pdfIn PDF document text
- https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef46c68bc8---luvatamalukusinirovaz.pdfIn PDF document text
- http://cgpreceptor.com/ckfinder/userfiles/files/lasad.pdfIn PDF document text
- https://hunghiephuylog.com/upload/files/mivaboroxoketadelukizudu.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_off0000d02f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD02F	10684 bytes
SHA-256: `026449daef3e671176c730d6f6e5ec64024a77e145c4bf841ec307f75232201c`
`font_01_sfnt_off0000e8b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8B0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000100c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100C2	18192 bytes
SHA-256: `d656e44b220c2a4eff7c9c055907e0e6a7335b117cdd6123459830174f602216`

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