PDF malware analysis — malicious · 70af2076b2a80617

MALICIOUS

PDF

86.4 KB Created: 2021-09-21 18:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 0fe05a1937522e1eef71f8aef8bcc4c0 SHA-1: 10da405ad0ceb3ff4b3b23650326f69af190708d SHA-256: 70af2076b2a80617de4c59a2858ac4f538d0d7a1bd94680f261409f41d5c9ed5

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many of which are part of a link farm on disposable hosting, strongly suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

Heuristics 5

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.
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://smidgel.ru/uplcv?utm_term=smart+iptv+apk+unlocked PDF link annotation
- http://navigator-nsk.ru/userfiles/file/10070735500.pdfIn PDF document text
- https://4cmedica.com/ficheiros_upload/file/27530854101.pdfIn PDF document text
- https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/b5a82b1c6b234d1131b2ee2d2c4e3484/tumeririfutusonolekowuf.pdfIn PDF document text
- https://spheresignal.com/app/webroot/userfiles/files/83632453642.pdfIn PDF document text
- http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/reviwusuwusepakojani.pdfIn PDF document text
- http://recviem.ru/img/upload/sewexipesolubazajobi.pdfIn PDF document text
- https://paidionresearch.com/userfiles/files/xibix.pdfIn PDF document text
- https://maciejabramowicz.pl/upload/files/file/vixusonupufitulapep.pdfIn PDF document text
- https://www.casestilistas.es/ckfinder/userfiles/files/riwelexatawagomo.pdfIn PDF document text
- http://www.huntsvillepr.com/files/files/lizakel.pdfIn PDF document text
- http://beiwendq.com/data/attachment/file/juvugavifaxibuver.pdfIn PDF document text
- https://fiscalonline.eu/app/webroot/files/userfiles/files/81798433555.pdfIn PDF document text
- https://niboparis.com/upload/fckeditor/files/simogipiwukukulog.pdfIn PDF document text
- http://openendrep.com/userfiles/files/35315543538.pdfIn PDF document text
- http://twtime.com/uploads/files/202109092100485855.pdfIn PDF document text
- http://bajajsports.com/userfiles/file/19809336983.pdfIn PDF document text
- https://fajanav.com/aym_image/files/xivajowupege.pdfIn PDF document text
- http://zhuoer.ltd/userfiles/file/26861701001.pdfIn PDF document text
- http://alltimescare.com/attachment/files/69291692697.pdfIn PDF document text
- http://seasonsblinds.com/uploads/ckfinder/userfiles/files/dezabejuvojaz.pdfIn PDF document text
- https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/d71b0f2ab637a2beb49e13c7faf2510a/rawilabex.pdfIn PDF document text
- http://citranco.com/users/files/dutupalapubir.pdfIn PDF document text
- http://makesomenoise.hu/upload/file/20379119801.pdfIn PDF document text
- http://startmatbaa.com/userfiles/file/zobulut.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ccf6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCCF6	10840 bytes
SHA-256: `5d01890f308f69f04213d9b86496adb0d28b6ea0e61a8f557d361e21fab9b4e8`
`font_01_sfnt_off0000e5ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5EF	16148 bytes
SHA-256: `1c024217ce21bb66922f73502146d3c7616b47413e2e194c36dd680b30e64e78`
`font_02_sfnt_off0000fb77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB77	21500 bytes
SHA-256: `3b3cd981ae6b35ead500799f585f1aae69ce95518a9034614e797660ef53498f`
`font_03_sfnt_off00013344.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13344	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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