PDF malware analysis — malicious · 187409479d855287

MALICIOUS

PDF

95.1 KB Created: 2021-06-28 19:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: c061952f693e59633e64f7a727f5d6c4 SHA-1: 78c4ef8f7b16c42770a4ccd33c17b1cee6e5ee16 SHA-256: 187409479d8552876f6eda4db35eceb16ef9cd8b0898aa8b878578458e604797

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites and disposable domains, suggesting an attempt to distribute further malicious content. The presence of urgency language further supports a phishing or social engineering attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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
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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://firegallery.ru/img/upload/jifufep.pdf In PDF document text
- http://debsecond.net/UserFiles/File/40843782152.pdfIn PDF document text
- https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/skdlbebsnbg8ka959amo3s1o94/95193721541.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/11ea52bccf4b68ebfac4b9e747605b05/daporijikiwivurumoga.pdfIn PDF document text
- http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/918eb28c9db8e1a880346f9fdb0c3b47/xumigibu.pdfIn PDF document text
- http://df-2.de/images/daten/file/bapiximamotoz.pdfIn PDF document text
- https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160810034c9254---2830174120.pdfIn PDF document text
- https://bititechnika.com/uploads/file/lasomogul.pdfIn PDF document text
- https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/69832cd12c79196796577014c709c4a7/bosukepobidawidonu.pdfIn PDF document text
- https://csn-alliance.com/data/files/33100280316.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac472a820a---xubinefesazuta.pdfIn PDF document text
- https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e6c167251---zokonuvemenajadizeli.pdfIn PDF document text
- http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc87d5a3a1---sonat.pdfIn PDF document text
- http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2cde9c95e---44623704334.pdfIn PDF document text
- https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d090c4b8dd---70724806589.pdfIn PDF document text
- https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/ns5e60cnejp2kqmcfgebbb6ofk/3129367843.pdfIn PDF document text
- https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/3e8e18d522a5c845ff66b984f2572a1d/7672353653.pdfIn PDF document text
- https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/e8fed9fdd7dc318315e8840b0434a1ac/riwifofadupoxalogolodoxu.pdfIn PDF document text
- http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097719e17de4---95509871263.pdfIn PDF document text
- http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa8172e2a7---lifegos.pdfIn PDF document text
- http://supermarketdv.ru/files/file/69606797835.pdfIn PDF document text
- https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/e2aa3f87a974555f10f92ca9e8bfd9d6/fetirariwikogefisoresi.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=embedded+meaning+in+malayalamPDF link annotation
- 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_off00011038.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11038	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001284f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1284F	10340 bytes
SHA-256: `1b43ecfc59fd620a95f55e490213ed5c21a3ab1d46eebd2043c3fe564b836f52`
`font_02_sfnt_off00013f54.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13F54	17544 bytes
SHA-256: `8c3b8c199bf202b10f39c3285ba24e68ee0de6b72c88463b0504ca9546c31ad1`

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