PDF malware analysis — malicious · 7e7b62437db53351

MALICIOUS

PDF

76.9 KB Created: 2021-09-20 22:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 35dda2c1c7d8ca75f50b305622d3513f SHA-1: 4f7fcc9b2370691a3f11024eb32b90dedb20203a SHA-256: 7e7b62437db533519309e90bf54abc47f74370f2815fec08db396ba4416534af

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that the PDF is part of a campaign to drive traffic to various disposable domains.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

Heuristics 7

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.
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://cructi.ru/uplcv?utm_term=how+to+transfer+mi+notes+to+another+phone PDF link annotation
- https://luminex.pl/upload/file/99890927359.pdfIn PDF document text
- http://bunny888.com/ckfinder/userfiles/files/sanifulojibiw.pdfIn PDF document text
- http://tsuiteru66.com/userfiles/file/merelefawilijo.pdfIn PDF document text
- http://kingalbertltd.com/uploadedfiles/file/tegurat.pdfIn PDF document text
- http://techmechengineers.com/uploads/vegulutulemozidemovo.pdfIn PDF document text
- http://friulanapanini.com/images/file/38508459674.pdfIn PDF document text
- http://www.grupoaccs.net/ckfinder/userfiles/files/87351270691.pdfIn PDF document text
- https://naucharts.com/ckfinder/userfiles/files/zemejatifon.pdfIn PDF document text
- http://ccsctda.com/ckfinder/userfiles/files/20210912_040609.pdfIn PDF document text
- https://fairtradeportal.pl/userfiles/file/71681030131.pdfIn PDF document text
- http://www.urbanwaterways.info/files/51803520416.pdfIn PDF document text
- https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/g3qufqvmg9rhv4gb7ia7gnl6pe/fuvowefibuwu.pdfIn PDF document text
- http://rpsbchamber.org/editorData/file/52088040271.pdfIn PDF document text
- https://danfort.lv/userfiles/file/86076791461.pdfIn PDF document text
- http://firstcuwire.com/file_media/file_image/file/71067988804.pdfIn PDF document text
- http://copingconversations.com/userfiles/file/kutavowutegevalelowe.pdfIn PDF document text
- http://studiogallerani.it/userfiles/files/26570863579.pdfIn PDF document text
- http://topas.lt/userfiles/file/jiwudeboreputaxefivones.pdfIn PDF document text
- https://atrax.eu/userfiles/file/97793461837.pdfIn PDF document text
- http://dejede.com/userfiles/file/popenegoburok.pdfIn PDF document text
- http://stattus.com/assets/file/punatawe.pdfIn PDF document text
- http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161321cbed5d59---98781851897.pdfIn PDF document text
- http://tanabuauto.com/js/upload/files/lonajegolawozenafitolotu.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_off0000c7f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7F2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e009.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE009	10656 bytes
SHA-256: `2064966d8b904f9f936e014f19072154330334f0f563c58835919063bf505e94`
`font_02_sfnt_off0000f846.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF846	17828 bytes
SHA-256: `537ef825229ae1047f801e4516bd65a79f729f89ac615cbb20549c5b97713d73`

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