PDF malware analysis — malicious · a4359be5c39cfe7c

MALICIOUS

PDF

89.0 KB Created: 2021-09-06 03:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: f7173649aee2ce7bb3b3bf53927c279d SHA-1: 202c854c5a62b40f038d7650d685628a2346b0fb SHA-256: a4359be5c39cfe7cf33af90ae3eca2983dffa7d71666dfb425ca5adf06b6f113

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm or phishing lure. The document body was unreadable, but the heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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 http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c40ee9592c8---tomininufatomameterixolar.pdf In PDF document text
- http://koslita.eu/ckfinder/userfiles/files/roganososovivoxuk.pdfIn PDF document text
- https://parklanehotel.asia/userfiles/file/98490802826.pdfIn PDF document text
- https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/0t44kvvrbsoihiqrk3a6r6pd9g/34291839743.pdfIn PDF document text
- http://sushinamu.com/uploads/files/27309116623.pdfIn PDF document text
- https://mavibusiness.it/file/93364298861.pdfIn PDF document text
- http://vom-ragnaroek.de/uploads/file/67102640640.pdfIn PDF document text
- https://szekszardportal.hu/userfiles/file/34598361177.pdfIn PDF document text
- http://deltastal.ru/userfiles/file/makiwutexakusivip.pdfIn PDF document text
- http://altronic.pl/!mag2011/userfiles/file/52588894930.pdfIn PDF document text
- https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/250bb71b0ae52f0b45f2acf587e78f60/42256043455.pdfIn PDF document text
- http://distributoram.com/files/file/97019133928.pdfIn PDF document text
- http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1612ab6a2b56ee---gabofusiliz.pdfIn PDF document text
- https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606eafcd3793e---24842456807.pdfIn PDF document text
- http://chickendaylacrescenta.com/uploads/files/57150310648.pdfIn PDF document text
- http://cl-pub.com/files/files/nusadufos.pdfIn PDF document text
- http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f98fe43cc---54244412695.pdfIn PDF document text
- http://aeronautike.com/userfiles/file/88399095787.pdfIn PDF document text
- http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68dbc9bdc9---97391817850.pdfIn PDF document text
- http://www.companyforte.com/imagenes/editor/file/jetebelowokavivujufejaz.pdfIn PDF document text
- https://iieng.org/editor/ckfinder/userfiles/files/lukakiga.pdfIn PDF document text
- https://dienlanhhonganh.com/images/pic/file/fiseze.pdfIn PDF document text
- http://tonwen.org/userfiles/file/87793928766.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=descortezador+manual+en+inglesPDF link annotation
- http://www.thaiticketmajor.com/static/imgUpload/files/degezulezeseru.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_off0000f241.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF241	10876 bytes
SHA-256: `a4ac1919047bd06e26692b459fa633e022a57e718580d076705afbda53e90878`
`font_01_sfnt_off00010b32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B32	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012344.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12344	19524 bytes
SHA-256: `27fc1a9edc2a33f8f3beec9fde7f0f5caab831618ee6f856909c672fb8f1768f`

Open this report in the interactive analyzer, or submit your own file for analysis.