MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of heuristics related to link farms and compromised CMS uploads suggests an attempt to distribute further malicious content. The 'Password-protected archive handoff' heuristic strongly implies that the PDF's purpose is to trick the user into decrypting and accessing a secondary payload, likely a downloader or exploit.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
Heuristics 7
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LUREDocument gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF 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.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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://laborke.ru/uplcv?utm_term=pdf+fillable+form+online+free
- http://magnachip.cn/userfiles/file/20210510043631.pdf
- http://hoteldarim.ir/basefile/hoteldarimir/files/rifaletadalilelexubav.pdf
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81c1baf279---60255333618.pdf
- http://change4best.ru/upload/file/91423515040.pdf
- http://veraschwemmle.de/fckdata/file/zokugalusin.pdf
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c8f6427063---poluvipamikuxabizidoxa.pdf
- http://baihsad.com/userfiles/files/20210719_205733.pdf
- https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/ce31570ce620222c194667feac14c921/95099931606.pdf
- http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c9e27a525---62390117205.pdf
- https://artenika.pl/fck/file/vemefavizexe.pdf
- https://sealskinz.ru/files/file/davekisuxorexoxepifobe.pdf
- https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46d0de8a50---13020786122.pdf
- https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/ccc3443bf608409696f4f3023122c5fe/sitizewuvirokutujovi.pdf
- http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/gimimomarozubul.pdf
- http://mirai-kankyo.com/userfiles/files/sisekagavumosinekowoja.pdf
- https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f14695fb17---zimokuxusojalekolex.pdf
- http://legalinet.eu/userfiles/files/rukovowoguxaxudoto.pdf
- https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/89e16e9e54a47e8230f98f2339a5959f/xefub.pdf
- http://ersatzmonitor.de/userfiles/file/50482116448.pdf
- http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813e04a6fca---20060090814.pdf
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612aeabf3ea9b---41139598096.pdf
- http://retrievers.su/ckfinder/userfiles/files/75528419842.pdf
- https://jerseyshorepirates.com/userfiles/files/17856692747.pdf
- https://airflow-skateboards.com/userfiles/files/23528765323.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000c252.binb4eada8b4e6b695ca4c056bc8c7f90e7fe73552ed749b8c7ae76a75aa6409b7c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC252 | 17412 bytes |
font_01_sfnt_off0000eef1.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEEF1 | 16792 bytes |
font_02_sfnt_off00010708.bin5c4d7b30ed929617efc31d2d8472725355bb52eb511f936ad0c42a8940d4781d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10708 | 10392 bytes |
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