PDF malware analysis — malicious · 67271bc0ce20557e

MALICIOUS

PDF

78.6 KB Created: 2021-09-19 00:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: e6161f6217a44e21f056c18b64b0ffc4 SHA-1: 9a953c821d4f6327e78603d5401a26ac250058c8 SHA-256: 67271bc0ce20557ef1a2e7284b630d1ccd38e174c063c341d53a4a97e48dcb3b

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded JavaScript stream and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm hosted on disposable domains, a common tactic for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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
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://garglob.ru/uplcv?utm_term=biggest+file+on+play+store PDF link annotation
- https://komunalno-vrgorac.hr/files/5086518479.pdfIn PDF document text
- http://www.pibmg.com.br/ckfinder/userfiles/files/files/57161514766.pdfIn PDF document text
- http://unsersohn.com/images/file/febivuluj.pdfIn PDF document text
- http://daieimotors.com/js/upload/files/xapupetikiwaweminido.pdfIn PDF document text
- http://dreamwith.gni.kr/ckupload/files/mofigosudez.pdfIn PDF document text
- https://darkoyunpin.com/calisma2/files/uploads/lizuwipevan.pdfIn PDF document text
- https://bruceautoservice.com/files/file/fovadufawedoja.pdfIn PDF document text
- http://hongdanhaudio.com/luutru/files/34002348137.pdfIn PDF document text
- http://mg001.cn/upload_fck/file/2021-9-18/20210918140029886475.pdfIn PDF document text
- http://kagoshimakojintaxi.com/userfiles/file/nufojomoserudikozapibuj.pdfIn PDF document text
- https://iqrainternationalschool.org/_assets/files/bolonokunebaminulu.pdfIn PDF document text
- http://atrsara.ir/resource/files/33506632076.pdfIn PDF document text
- http://usefchina.com/uploadfile/file///2021090914484177.pdfIn PDF document text
- http://reguitti-engineering.it/userfiles/files/34058705625.pdfIn PDF document text
- http://rogersdesignhouse.com/uploads/files/13165844046.pdfIn PDF document text
- http://protezas.lt/i/File/tobogibenupebexejazik.pdfIn PDF document text
- https://7mark3t2-7aya.com/contents/files/ravelujiw.pdfIn PDF document text
- http://aktasmatbaacilik.com/resimlerfiles/jipivonedowopusaju.pdfIn PDF document text
- https://horkolas-gatlas.hu/ufiles/file/66073149536.pdfIn PDF document text
- http://glovimex.com/uploads/ckfinder/files/17050458671.pdfIn PDF document text
- https://www.lire-les-notes.com/ckfinder/userfiles/files/jowiketumejowokasep.pdfIn PDF document text
- http://eegbiofeedback-leszno.pl/userfiles/file/41520477643.pdfIn PDF document text
- http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/tevatamibitifafu.pdfIn PDF document text
- https://rwd1.thadv.com/upload/files/zametidiligeruwu.pdfIn PDF document text
- http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f41196ab2e---jipapebome.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_off0000cf87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF87	10700 bytes
SHA-256: `f16a8ed012c762728516fa26ba1f4889ac2824ddabbc663eb658cd98a25ca793`
`font_01_sfnt_off0000e841.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE841	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010053.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10053	17148 bytes
SHA-256: `397fbd4beb77209288e0190cff09ec079ba83fcbbb9e2ed83045ab4a6ef41c50`

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