PDF malware analysis — malicious · 9b90f373bcfa0a35

MALICIOUS

PDF

85.1 KB Created: 2021-09-17 07:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 30d482757b1b58390299bde0720a9032 SHA-1: f78b35487ecb69d1ee4fe775817ba1daeba47479 SHA-256: 9b90f373bcfa0a356464b2fe570074ebd7006370d1270cbcc6f6339e376ccabc

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, embedding numerous URLs, with one specifically identified as a potential redirector. The presence of a visual download button lure further supports a phishing or malware distribution intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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/uplcv?utm_term=sapthagiri+llb+full+movie+online+watch PDF link annotation
- http://avrig35.ro/uploads/fck_editor/file/28851896624.pdfIn PDF document text
- http://hutnia.pl/userfiles/file/10789146414.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/hma4voop36cuvpmhush470knn2/barelipovomaj.pdfIn PDF document text
- http://pharmorgsyn.com/upload/files/zizujawejajoxepegetug.pdfIn PDF document text
- https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132e9f6ed0df---juvoliwixutofajo.pdfIn PDF document text
- http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/59406401346.pdfIn PDF document text
- http://fundacionecla.org/resources/original/file/nizukigo.pdfIn PDF document text
- http://ms-beauty.com/ckfinder/userfiles/files/meruvokapan.pdfIn PDF document text
- http://depcip.com/app/views/panel/ckfinder/userfiles/files/16892254951.pdfIn PDF document text
- https://zniczekowalczyk.com/user_images/file/7448550072.pdfIn PDF document text
- http://muszempilla.com/files/file/5912367245.pdfIn PDF document text
- https://piti.leaddeehub.com/userfiles/files/refuseliri.pdfIn PDF document text
- http://phukientubepxinh.info/gomsu/sanpham/anh/files/40933731388.pdfIn PDF document text
- http://planet-for-events.de/userfiles/file/76304017331.pdfIn PDF document text
- http://oxigensupplies.com/shipinc/userfiles/files/vuvozakudobeti.pdfIn PDF document text
- https://wecareu.net/ckfinder/userfiles/files/69904706578.pdfIn PDF document text
- http://szentistvanpatika.hu/upload/file/defotekaligelupopesoduk.pdfIn PDF document text
- http://parateam.cz/file/zabakugoboneromukute.pdfIn PDF document text
- https://greenvalleykerala.com/ckfinder/userfiles/files/26342199292.pdfIn PDF document text
- http://tw-tms.com/uploadpic/xw/files/watevilafom.pdfIn PDF document text
- http://neuchina.org/userfiles/file/femagodawusevi.pdfIn PDF document text
- http://sarkar.ie/userfiles/file/16100138829.pdfIn PDF document text
- http://sportingclubalbinia.eu/userfiles/files/gadiwojoxekumug.pdfIn PDF document text
- http://teedinmaesai.com/user_img/file/15280786624.pdfIn PDF document text
- https://hunghiephuylog.com/upload/files/23255880650.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_off0000e4f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4F9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fd0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD0B	18208 bytes
SHA-256: `330947e38a8da240f53d8c03a18571978ef882b7244cb910cfcf7182a5953f2b`
`font_02_sfnt_off00012c25.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C25	11224 bytes
SHA-256: `0141f70a13e16917cb3ec66bb89ff87cbd696cbe1306dd9dd05a32a5649e7317`

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