PDF malware analysis — malicious · d88abf389157e0e0

MALICIOUS

PDF

71.9 KB Created: 2021-09-22 23:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 7d924a36e8322551fda2f8715df60687 SHA-1: eeda301450e3a29570388cfe719c4a00f1a53656 SHA-256: d88abf389157e0e0325456e18ce926d53bfceae12faa9860a8c280cee8437270

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded JavaScript and numerous external URIs suggests it's designed to exploit vulnerabilities or redirect users to malicious sites. The 'SE_CALLBACK_LURE' heuristic strongly points to a callback phishing or tech-support scam, where the user is prompted to call a number, likely to extract sensitive information or money.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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://oniceh.ru/uplcv?utm_term=universe+galaxy+solar+system+order PDF link annotation
- https://infrapanel-alegjobbfutes.hu/userfiles/file/vetufudusupodori.pdfIn PDF document text
- http://jayeonrak.com/upfile_editor/2021/files/48249393576.pdfIn PDF document text
- https://printsolutions.ro/uploads/wysiwyg/files/lubajopigefezow.pdfIn PDF document text
- https://shop-ecobati.com/medias/upload/files/74638396661.pdfIn PDF document text
- http://regalmotors-jp.com/js/upload/files/14689962858.pdfIn PDF document text
- https://kermanrooz.com/img/files/dozane.pdfIn PDF document text
- https://dalyanestate.com/userfiles/file/kanefimetiwos.pdfIn PDF document text
- https://aymexco.eu/ckfinder/userfiles/files/14345282925.pdfIn PDF document text
- https://groupburuemas2.com/contents/files/52753105662.pdfIn PDF document text
- https://tempatpasang.com/contents/files/vurevof.pdfIn PDF document text
- http://design-klasse.de/ckfinder/userfiles/files/10370093218.pdfIn PDF document text
- https://gruppopolidori.com/upload/image/file/95984513255.pdfIn PDF document text
- http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161452563ab071---tamofefika.pdfIn PDF document text
- https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/45142850741.pdfIn PDF document text
- https://chung-pei.com/userfiles/file/lademabiranares.pdfIn PDF document text
- https://fong-cai.com/upload/files/jovaralaxoburajizubumuw.pdfIn PDF document text
- https://98ing.com/upload/ck/files/20210905_190835.pdfIn PDF document text
- https://taechoclub.com/FileData/ckfinder/files/20210908_2F73D42573D72C64.pdfIn PDF document text
- http://pn-tech.net/userData/board/file/xudekodipe.pdfIn PDF document text
- http://vyveva.eu/UserFiles/File/89123252608.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_off0000b73b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB73B	16332 bytes
SHA-256: `7d5745ff6afcc744b05f0f12418216cf715a54a8af03b464aadeb5ec5ac6fe0e`
`font_01_sfnt_off0000e121.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE121	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f938.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF938	10880 bytes
SHA-256: `f0f72ad8acc40069b75473e6c11cd12eaee6d93e0ffdc1eae686c20615a496e2`

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