PDF malware analysis — malicious · 9b157521832fb604

MALICIOUS

PDF

79.4 KB Created: 2021-09-11 12:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 942fd1a9e78923bf4be8102fe94e5e8b SHA-1: 48a007d7e0485b1a80c5f3fde0621041235f8d61 SHA-256: 9b157521832fb60458fa512c4c73241441d93772e3090532c94def73450da866

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, strongly indicating malicious intent. The ClamAV detection and ML classifier further support this, flagging it as a phishing trojan. The document's structure suggests it functions as a link farm, directing users to potentially harmful websites for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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
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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://synerhu.ru/uplcv?utm_term=tap+tap+app+pubg PDF link annotation
- http://pawsandtiaras.com/ckfinder/userfiles/files/ladukatepomigeruvuzo.pdfIn PDF document text
- https://orangcar.com/app/webroot/upload/files/26668238770.pdfIn PDF document text
- https://piti.leaddeehub.com/userfiles/files/vebifisemelonakirirodavu.pdfIn PDF document text
- http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/37561897177.pdfIn PDF document text
- http://sjzhtchem.com/upload/files/93952896198.pdfIn PDF document text
- http://modulobase.com/userfiles/file/45124809123.pdfIn PDF document text
- http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613c66109dfda---94120356858.pdfIn PDF document text
- http://younewstoday.com/task/userimages/file/fuxirebefaxulog.pdfIn PDF document text
- https://phuketwebstudio.com/ckfinder/userfiles/files/23607768758.pdfIn PDF document text
- http://wolfroccatiassociati.it/userfiles/files/tapojiredo.pdfIn PDF document text
- http://ecohort.com/userfiles/files/76731625889.pdfIn PDF document text
- http://savytrading.com/userfiles/file/49521028930.pdfIn PDF document text
- http://turbotechnik24.de/userfiles/file/43787071029.pdfIn PDF document text
- http://garage-ys.info/js/upload/files/mozarutaw.pdfIn PDF document text
- https://pharma-tools.eu/galeria/file/90402211221.pdfIn PDF document text
- http://wienbildarchiv.com/upload_files/files/67202452751.pdfIn PDF document text
- http://ziconiavip.com/uploadfck/file/pexapun.pdfIn PDF document text
- https://la-klamm.org/Files/files/sagupezobuvokanano.pdfIn PDF document text
- https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/443bbf96aa501df8f7e77ae07fa98a94/zubelatez.pdfIn PDF document text
- http://casadiriposomarsala.it/userfiles/files/12645897785.pdfIn PDF document text
- http://mansiya.com/uploadfile/files/76783662353.pdfIn PDF document text
- http://baove247.org/upload/files/91261060459.pdfIn PDF document text
- http://abnig.friendship-match.com/upload/files/nigesofagulodisugawosut.pdfIn PDF document text
- http://pijntherapie.be/uploads/files/26809353797.pdfIn PDF document text
- https://moveo-sport.pl/userfiles/file/61826196208.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_off0000d52d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD52D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ed3f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED3F	17656 bytes
SHA-256: `e039dd7eb330a7067a239e8ff5a48c0ecedafc5f538b6732b460a0c5526d9e5c`
`font_02_sfnt_off00011aab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AAB	9868 bytes
SHA-256: `6d5498c086b4ccae2f4de795f210b8a0c0cd34ba9cfa1e64a681e170ded2ee89`

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