PDF malware analysis — malicious · 7cb7ab0bea05b216

MALICIOUS

PDF

77.2 KB Created: 2021-06-06 14:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13

MD5: fd3c5e62bb1134ada0d6f479b1cd6adc SHA-1: db0b015893f790732ce0b1a1c5a9ad0c0a2dc080 SHA-256: 7cb7ab0bea05b216965b43867d43c1116f125a98f5a6f3fdb08c3f9ad4fb6deb

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains a reference to 'mad tank mod apk download' and an associated URL, suggesting a phishing or malware distribution lure. The presence of external URIs and a link farm heuristic further supports the malicious nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://crysiq.ru/pbw?utm_term=mad+tank+mod+apk+download PDF link annotation
- https://static.s123-cdn-static.com/uploads/4446400/normal_5febd43f724cd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453129/normal_603c773cefa76.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4477886/normal_606e2e3595156.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381751/normal_5fd3358eca677.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4465125/normal_5fd077094eb46.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4402717/normal_5ff955b04ba54.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4418567/normal_5fdef413e6dba.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387581/normal_601418ae46aed.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://gudikijuruf.pbworks.com/f/manual_cto_pediatria_10_edicion.pdfIn PDF document text
- http://kunixove.pbworks.com/f/seradareluvir.pdfIn PDF document text
- http://gazumadu.pbworks.com/w/file/fetch/144467406/definicion_y_caracteristicas_de_la_investigacion_cualitativa.pdfIn PDF document text
- http://vugufosenene.pbworks.com/w/file/fetch/144714027/witusuguwujepos.pdfIn PDF document text
- http://tagexoba.pbworks.com/f/livixajeboba.pdfIn PDF document text
- http://nadupodifado.pbworks.com/f/99112906187.pdfIn PDF document text
- http://poxanoralanu.pbworks.com/w/file/fetch/144654018/muecas_lol_para_colorear_e_imprimir_gratis.pdfIn PDF document text
- http://viluxese.pbworks.com/f/new_construction_final_walk_through_checklist_template.pdfIn PDF document text
- http://tedadopite.pbworks.com/f/porolovekewapusamukasa.pdfIn PDF document text
- http://gegoxelaw.pbworks.com/w/file/fetch/144705381/60713499139.pdfIn PDF document text
- http://sisagexal.pbworks.com/f/epictetus_discourses_and_selected_writings_penguin.pdfIn PDF document text
- http://rawumadakora.pbworks.com/f/lepedawefepil.pdfIn PDF document text
- http://fixulirulafa.pbworks.com/w/file/fetch/144491802/keystroke_logger_android_free.pdfIn PDF document text
- http://difusowafid.pbworks.com/f/suxuvusewipolabutujovisew.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://scripts.sil.org/OFLIn 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_off0000dbee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBEE	4992 bytes
SHA-256: `f8b08007c9ec2c03465492d4aac95f9a91071dace23654c354924f8b6f405dce`
`font_01_sfnt_off0000ecf7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECF7	11120 bytes
SHA-256: `913606d5dfc061d301abfcfb249b5a57c3de3362abae577289fffb80d98458df`
`font_02_sfnt_off000112ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112AE	16068 bytes
SHA-256: `89247d3646e3773572243f1d4b0449240b5d7bcbc9865045ac28c7845acd9c8f`

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