PDF malware analysis — malicious · e375362df697fb1f

MALICIOUS

PDF

77.9 KB Created: 2021-09-22 12:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 875ca6ccc20eaebb93d043cd992ccd44 SHA-1: a93cac38820baaa12f528a5c4b6d804af4a6b29a SHA-256: e375362df697fb1f333d85b12a4afb065865d73253670318e0aa2bbb3a3afe15

174 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and multiple external URIs, indicating it is designed to lure users into downloading further malicious content. The 'Fake CAPTCHA' heuristic strongly suggests the document's purpose is to deceive users into executing commands or interacting with the malicious content. The ML classifier also flagged this PDF with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
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://chcial.ru/uplcv?utm_term=seo+keyword+density+checker PDF link annotation
- http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/wupej.pdfIn PDF document text
- http://chukgoobok.com/files/fckeditor/file/35562597015.pdfIn PDF document text
- https://gadd-asso.org/userfiles/file/zorevotezukuguwaw.pdfIn PDF document text
- https://acconpriti.com/ckfinder/userfiles/files/buxisazapotunanasugepiron.pdfIn PDF document text
- http://geasit.it/userfiles/files/61939857755.pdfIn PDF document text
- https://vegan-eshop.cz/data/file/12498253270.pdfIn PDF document text
- https://agencement-menuiserie-var.fr/stockages/files/pepijegepanobo.pdfIn PDF document text
- https://podimercrm.com/img/files/16104022887.pdfIn PDF document text
- https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/pezetufu.pdfIn PDF document text
- http://romento.com/uploaded_files/userfiles/files/jiginanun.pdfIn PDF document text
- https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139eda4c17dc---9931459340.pdfIn PDF document text
- https://anandalaya.in/resources/file/telod.pdfIn PDF document text
- http://ctkupavna.ru/upload/file/sumixazenel.pdfIn PDF document text
- https://agmatbaa.com/upload/files/kulekipijozelovadir.pdfIn PDF document text
- https://xylemleads.com/userfiles/file/labadegag.pdfIn PDF document text
- http://zamokugrofa.sk/admin/fckeditor/file/gekabufexijaroguraji.pdfIn PDF document text
- https://olympicwroclaw.pl/zdjecia/fck/file/55295151052.pdfIn PDF document text
- http://www.ondebiz.com/userfiles/file/lagivobonuzot.pdfIn PDF document text
- https://corpusbg.com/files/fck/file/belazev.pdfIn PDF document text
- https://bishopsalamatkhokhar.org/userfiles/file/fuwedefubilegoleb.pdfIn PDF document text
- https://buddhaart.in/userfiles/file/joweniku.pdfIn PDF document text
- http://dishandspoonproductions.com/ckfinder/userfiles/files/monevonosuvuzuf.pdfIn PDF document text
- https://collinite.pl/userfiles/file/xatidawivukutejamagoj.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_off0000cc4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC4F	10628 bytes
SHA-256: `25a578a989833503fff71898b73c8570e76b6e2c84b55af58f90b70668e3d6e5`
`font_01_sfnt_off0000e49c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE49C	17556 bytes
SHA-256: `54395958902c9f938d8ace69e86d33dd48e761f3904f41709838b3ba4bf10ed8`
`font_02_sfnt_off00011201.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11201	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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