PDF malware analysis — malicious · 7b34eb9692038791

MALICIOUS

PDF

82.8 KB Created: 2021-09-10 05:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 35d9ddcf56634d9771f76bed6a4c7abc SHA-1: 9b5e9a4076053df83ec2727b9360b08ee15864b9 SHA-256: 7b34eb969203879150a48524215b9bf3a9b0a732489a6ce8824d189dba69cf9f

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document is designed to trick users into believing they need to download a password-protected archive. The presence of numerous links to disposable domains, including 'https://wastran.ru/uplcv?utm_term=the+best+pattern+password', supports this, suggesting an attempt to host malicious content or redirect users to phishing sites. No scripts were extracted, but the overall structure points to a social engineering attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://wastran.ru/uplcv?utm_term=the+best+pattern+password PDF link annotation
- http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/tulanekubajomuwazenozi.pdfIn PDF document text
- https://www.profiemg.cz/upload/ck/files/20330879963.pdfIn PDF document text
- http://www.ondebiz.com/userfiles/file/10576040057.pdfIn PDF document text
- http://espwireless.net/uploads/file/53289664486.pdfIn PDF document text
- http://kenshopvn.com/uploads/files/41240003311.pdfIn PDF document text
- https://alarrabnews.com/images/content/content/file/kuwalefegikofobugolagu.pdfIn PDF document text
- http://chipublichouse.com/ckfinder/userfiles/files/26548984992.pdfIn PDF document text
- https://daynexweb.com/upload/ckfinder/files/99199708326.pdfIn PDF document text
- https://veaodaibrahma.com/uploads/image/files/momivazunezajowide.pdfIn PDF document text
- http://studioingtassinari.eu/userfiles/files/rojewejiroj.pdfIn PDF document text
- http://tjsyjdq.com/v15/Upload/file/20219982749427.pdfIn PDF document text
- https://balajihighfields.in/userfiles/file/64493569685.pdfIn PDF document text
- http://nwatchonline.org/userfiles/file/loporesoju.pdfIn PDF document text
- http://seattlebestteriyaki.com/uploads/files/19103594578.pdfIn PDF document text
- https://www.ewdel.cz/ckfinder/userfiles/files/72854256416.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a606887e56---67598025681.pdfIn PDF document text
- https://mannoorpally.com/uploads/file/89563032398.pdfIn PDF document text
- http://burragebrothers.net/demo/jolie/beta/userfiles/files/13239247447.pdfIn PDF document text
- http://sewakendragroup.com/userfiles/file/rovexegur.pdfIn PDF document text
- https://kenkochaya.com/user_data/ckfinder/files/gutavo.pdfIn PDF document text
- http://schuetzenfest-hemeringen.de/ablage/userfiles/files/72374069717.pdfIn PDF document text
- https://bluetact.com/ckfinder/userfiles/files/33338415734.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_off0000deaf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEAF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f6c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6C1	18392 bytes
SHA-256: `6b7baa1652c5ebe94a1591a7dac1f83f0f062af6bfbe98e0830504062d277ff0`
`font_02_sfnt_off00012662.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12662	10540 bytes
SHA-256: `e6699326514f1b588858c7f294c39a624f1ccfbb77b145f652afe50f54272946`

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