MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains metadata related to its creation by wkhtmltopdf, and the primary heuristic firings point to a mass of external PDF links, indicating a campaign to redirect users to potentially malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9994
Heuristics 6
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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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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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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://krisoc.ru/pbw?utm_term=probability+and+statistics+for+engineers PDF link annotation
- https://refapezi.weebly.com/uploads/1/3/4/9/134904673/f66f2e918bbb91a.pdfIn PDF document text
- https://govubazidexifa.weebly.com/uploads/1/3/4/3/134342639/saladonerike.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4445340/normal_5fe0f0230a0f1.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4460076/normal_60b2f525a417c.pdfIn PDF document text
- https://mukeremu.weebly.com/uploads/1/3/4/3/134316251/ketobapu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392656/normal_601cdb88cd4f4.pdfIn PDF document text
- https://zibabesisem.weebly.com/uploads/1/3/4/6/134670176/fomuwi.pdfIn PDF document text
- https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/mewuketupofapor.pdfIn PDF document text
- https://talaxosukizarom.weebly.com/uploads/1/3/0/7/130775084/8385623.pdfIn PDF document text
- https://vojowejejetolor.weebly.com/uploads/1/3/0/7/130775680/xujizomuduza.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485173/normal_606b315bcd784.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454040/normal_6019d9ca2c6d6.pdfIn PDF document text
- https://donedupefunesu.weebly.com/uploads/1/3/1/6/131607777/xowovabuxu.pdfIn PDF document text
- https://fujinimozebuxe.weebly.com/uploads/1/3/0/7/130738673/fuxax.pdfIn PDF document text
- https://zogudoweno.weebly.com/uploads/1/3/1/6/131637773/eeda7aad7.pdfIn PDF document text
- https://muvipedoboxeju.weebly.com/uploads/1/3/1/1/131163867/495a0b95ff2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378170/normal_60393a1e6e90c.pdfIn PDF document text
- https://keduwamiboru.weebly.com/uploads/1/3/4/6/134669925/9884b6a98eb6.pdfIn PDF document text
- https://bepupigo.weebly.com/uploads/1/3/4/3/134317889/a35d9c1.pdfIn PDF document text
- https://ratamugokamilel.weebly.com/uploads/1/3/5/9/135959592/mokifofe_waxabuvilix_siwavizomedo_risekamaxete.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4473619/normal_601d26e82601d.pdfIn PDF document text
- https://pawigesi.weebly.com/uploads/1/3/5/3/135389203/f2e3b.pdfIn PDF document text
- https://puvugemamoj.weebly.com/uploads/1/3/0/9/130969199/wazidop_goriwapuw_wotobener_vefopi.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000fbd6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFBD6 | 5432 bytes |
SHA-256: ff6fb6ee621b231c86d06de85e2c5894bd59e4e8595e8727599353f58156974f |
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font_01_sfnt_off00010e69.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10E69 | 10628 bytes |
SHA-256: e857c70d73ebbc289c600b6f05a3db055d4322dd90f9a25a37eefce042ee5bc5 |
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