PDF malware analysis — malicious · d0ba2d87cd0bae8d

MALICIOUS

PDF

81.5 KB Created: 2021-09-23 03:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 277e7df94c9e2c5a233e90452b13daac SHA-1: 41ff344e89461b4d42622efca89e07708963184a SHA-256: d0ba2d87cd0bae8d7ded4a3d0e6d41de574341eec1d3158d6bfd764e564574ec

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, and contains numerous external URIs pointing to potentially malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the presence of multiple external URLs and the overall detection profile strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

Heuristics 5

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.
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://infrive.ru/uplcv?utm_term=left+4+dead+apk+android PDF link annotation
- http://nineslash.com/user_file/file/73343312124.pdfIn PDF document text
- http://ongxoanhdpe.vn/upload/files/venezilenisabexok.pdfIn PDF document text
- http://jogagongu.pl/userfiles/file/47441515812.pdfIn PDF document text
- http://spiregene.com/image/files/20210913_122115.pdfIn PDF document text
- https://tvmreza.tv/ckfinder/userfiles/files/43940370131.pdfIn PDF document text
- https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/37218924012.pdfIn PDF document text
- http://sicilyontable.it/userfiles/files/junola.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f708819d8c---41591428661.pdfIn PDF document text
- http://propertiesforrent.com/userfiles/file///nadewepegaxile.pdfIn PDF document text
- http://timnhanhonline.net/upload/files/86942517516.pdfIn PDF document text
- https://flardochform.se/userfiles/file/nesokoxo.pdfIn PDF document text
- https://appvid.eus/userfiles/files/44324051767.pdfIn PDF document text
- http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/xegisebegegobi.pdfIn PDF document text
- http://cmsrecuperocrediti.it/images/file/zafalonewevegezavag.pdfIn PDF document text
- http://isleford.com/filespath/files/20210901201108.pdfIn PDF document text
- http://www.oomewatersport.nl/upload/files/robobavovixojiwobabuzofu.pdfIn PDF document text
- http://redskap.ru/userfiles/file/zajufewazos.pdfIn PDF document text
- http://brukbet.com/user_images/file/78065729945.pdfIn PDF document text
- https://bdprescription.com/ci/userfiles/files/xasafapekawigisa.pdfIn PDF document text
- http://chiesamadremarsala.eu/userfiles/files/dixudufar.pdfIn PDF document text
- https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/61134373324.pdfIn PDF document text
- http://solis.altrodesign.eu/ckfinder/userfiles/files/77476183081.pdfIn PDF document text
- http://huarui-bio.com/upload/files/68255598457.pdfIn PDF document text
- https://fier-forjat-valimet.ro/ckfinder/userfiles/files/84232959320.pdfIn PDF document text
- https://anakmeong.com/contents/files/gugafetutulokebel.pdfIn PDF document text
- http://jiin-torng.com/uploadfiles/20210912095113.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_off0000da0f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA0F	10404 bytes
SHA-256: `2bfe5f8165193593a64488ea01095c4f29b15fe5eeb6cbc56a53e663dd6d9c17`
`font_01_sfnt_off0000f1bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1BF	17952 bytes
SHA-256: `222ea3f2c55874354febb5ff3bf0d23a3f3ad833067a6ca89a289c21f09eb553`
`font_02_sfnt_off0001207e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1207E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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