PDF malware analysis — malicious · d0adb702b2e79ad9

MALICIOUS

PDF

75.0 KB Created: 2021-09-16 13:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 0945d76390d554def1430712f1a0aa7a SHA-1: e36d88a2134c31faec3961e097c7bfb13fbcec71 SHA-256: d0adb702b2e79ad9bd033ee14acd839f89a56f0221f668f495092dce7af83d81

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and external URIs. The PDF contains numerous links to external domains, suggesting a phishing or redirection scheme. The presence of embedded JavaScript (T1059.007) indicates potential for client-side exploitation (T1203) to facilitate the download or execution of further malicious content, likely delivered via a spearphishing attachment (T1566.001).

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://wastran.ru/uplcv?utm_term=pokemon+go+coin+generator PDF link annotation
- http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/watazar.pdfIn PDF document text
- http://hwayoung.kr/upfile/files/nazowizoserutowopepibiwo.pdfIn PDF document text
- http://www.sudeshnamaulik.com/fckimages/file/bovelekiruforanedodibenum.pdfIn PDF document text
- http://sghscsjamarai.org/guruhargobind/userfiles/file/28416906003.pdfIn PDF document text
- https://prokoncept.hu/admin/blogfck/image/file/38358100267.pdfIn PDF document text
- http://lica-mpt.it/userfiles/files/biwemegazedepabunavuremi.pdfIn PDF document text
- https://oxi-dental.ro/imagini_ws/xezesedozazukojorof.pdfIn PDF document text
- http://to-kajihan.net/js/upload/files/29271022995.pdfIn PDF document text
- http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613a529bf1276---72201949460.pdfIn PDF document text
- http://luijkzonwering.nl/image/file/33412079271.pdfIn PDF document text
- http://csc0731.com/userfiles/file/20210909045146_g745yv.pdfIn PDF document text
- https://stancijanegrin.com/userfiles/file/85563411735.pdfIn PDF document text
- https://nyig.com/files/file/70208186213.pdfIn PDF document text
- https://thefertilizergranulators.com/d/files/nubagotujafamaveso.pdfIn PDF document text
- http://yanartekstil.com/firma/files/8295856109.pdfIn PDF document text
- https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/46ik9tvem3ilksutart9k9vrpe/89751509972.pdfIn PDF document text
- https://immo-cjeanpaul.lu/userfiles/files/rufugepuf.pdfIn PDF document text
- http://mtcnx.com/upload/fckimagesfile/59196876157.pdfIn PDF document text
- http://lab4050.com/upload/editor/file/japoviweropoza.pdfIn PDF document text
- http://odesignlab.ru/admin/ckfinder/userfiles/files/56061565779.pdfIn PDF document text
- http://cuboni.com/uploadfile/hong202109032211502744.pdfIn PDF document text
- http://gabinetortodontyczny.eu/userfiles/file/44891587461.pdfIn PDF document text
- http://wangyiphk.com/userfiles/gidodobugep.pdfIn PDF document text
- https://maydangson.com/vietkiendo/upload/file/99833759950.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_off0000c04e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC04E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d865.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD865	10452 bytes
SHA-256: `0aaba742f5951950c057d312bd85ff1c1e48b38ee26b3a1af5172d5cd6dcfaa9`
`font_02_sfnt_off0000f023.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF023	18036 bytes
SHA-256: `54f9f9442729a75f158f83ab0bd8f7fdd0648255cf6aac2b5146ca97e193ade9`

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