PDF malware analysis — malicious · d87bf2ff5d329a2c

MALICIOUS

PDF

80.1 KB Created: 2021-03-07 23:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: b72eb06a90b5cf8d57f3d2e467cb0666 SHA-1: 6393c614f64740c5e0993ebdc0c1f9f00331be61 SHA-256: d87bf2ff5d329a2c4d422b4ac9396dc24cac92c7b2656713d9300590cd131c17

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 https://soxebez.ru/strik?utm_term=list+any+two+operating+system+software PDF link annotation
- http://tvoeobrazovanie.fun/solve_quadratic_equation_vertex_formm2jqg.pdfIn PDF document text
- http://petrol-v-pol-price.site/fokuneviwd3si9.pdfIn PDF document text
- http://idealslimitaly-ufficiale.site/outlaw_biker_tattoos_meaningscg7gi.pdfIn PDF document text
- http://lojapidabud.mypressonline.com/87305583895.pdfIn PDF document text
- http://shoop-fp.ru/5367734647gx6jw.pdfIn PDF document text
- http://drawer.icu/59719638444kc39a.pdfIn PDF document text
- http://moscow-siberian-force.online/83478254411ilh90.pdfIn PDF document text
- http://strongcreditscore.info/nexisurexamugepupisiz20y80.pdfIn PDF document text
- http://kadabafomelu.66ghz.com/addictive_drums_3_free.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://kubomefewofumim.atwebpages.com/2007_honda_civic_ac_compressor_replacement_cost.pdfIn PDF document text
- https://s3.amazonaws.com/tejuvonixag/32520865344.pdfIn PDF document text
- http://puzexexaniledow.epizy.com/funny_quiz_questions_and_answers_for_whatsapp.pdfIn PDF document text
- http://nufiwimuzobo.onlinewebshop.net/nascla_contractors_guide_tennessee.pdfIn PDF document text
- http://javasuk.epizy.com/pimevuxotasetelevat.pdfIn PDF document text
- https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_e255734e7a12467e9dbf2f8d56b7dc01.pdf?index=trueIn PDF document text
- https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_9297124a864c4fe0a250da19f66f9428.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/daraniwekamidir/mimunivusemebe.pdfIn PDF document text
- https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_699524e6571a464c9275c67684a5bd70.pdf?index=trueIn PDF document text
- https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_5c60a86f945f47c3bf2f4c9c956f0518.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/veledabejufi/sugabedudozefolale.pdfIn PDF document text
- https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_4cdff1f280ad44afa61f035a883e27d9.pdf?index=trueIn PDF document text
- http://rixavadalut.rf.gd/kowirabasisamera.pdfIn PDF document text
- http://gixiluvigatekij.atwebpages.com/kib_monitor_panel_not_working.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ef94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF94	5112 bytes
SHA-256: `e3268f427619efba840413075dc794a6ce24c1a3a8f6fd26a74d4511a9c7bdc5`
`font_01_sfnt_off000100f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100F8	10516 bytes
SHA-256: `dba0202fa0e21e9e4b66add6feef5c5b95f35e04a7fe64b91d9216d49614a127`
`font_02_sfnt_off000124b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124B8	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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