MALICIOUS
236
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous links to external resources, many of which are hosted on disposable domains or compromised WordPress sites, indicating a link farm designed to distribute malicious content. The presence of a 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may instruct users to open a password-protected archive, a common tactic to bypass gateway security. ClamAV detection and ML classification further support its malicious nature.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
Heuristics 8
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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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PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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://inwebjor.ru/uplcv?utm_term=how+to+remove+android+pin+lock
- https://parvazyab.com/basefile/api203/files/19461185887.pdf
- https://crbz.ru/userfiles/file/85194520628.pdf
- http://mikailang.net/userfiles/file/20210919072911_608962106.pdf
- https://childrencareandliteracysociety.org/userfiles/files/vukadupajofibijixane.pdf
- http://olech-rzeszow.pl/userfiles/file/radopebed.pdf
- http://tksvolga.ru/userfiles/file/22004321962.pdf
- https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/riwowugilipitabatux.pdf
- https://cowichanseniors.ca/userfiles/file/38328986879.pdf
- https://maggievanostrand.com/uploads/media/file/femewafaluken.pdf
- http://thibangoto.com/app/webroot/uploads/files/liwifiwujepezapera.pdf
- https://esterkins.de/ckfinder/userfiles/files/jipapewozipuzanebibotuxov.pdf
- http://predit.ru/admin/ckfinder/userfiles/files/9681331671.pdf
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612eedcd00f8a---16856356415.pdf
- https://maturana.cl/upload/file/49129599038.pdf
- http://volker-issmer.de/userfiles/file/78685462411.pdf
- http://gndpta.eu/news_objects/files/bekofakipusafaxivumeju.pdf
- http://www.propper-droppers.nl/files/file/xuzetedojoni.pdf
- https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/5l6meeeus86h51io67ms8j0i8f/bivonetidaf.pdf
- http://okna-stv.ru/userfiles/files/73435033978.pdf
- http://htwy.com/upload/file/73847796277.pdf
- http://vector-food.com/userfiles/file/74514138904.pdf
- http://c2ctrading.org/cms_upload/files/17702924575.pdf
- http://massageindex.nl/images/uploads/labigitowotem.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_off0000dd4f.bin467535cea9feaa5b028dabb035179b337c04c2a41f39deada9813cf2ff3029a8 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDD4F | 18028 bytes |
font_01_sfnt_off00010bfb.bincbb3a0866d73441b1c20c06bf63ae8e818d9238576da9899d449fc71a85598b4 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10BFB | 10744 bytes |
font_02_sfnt_off000124a6.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x124A6 | 16792 bytes |
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