PDF malware analysis — malicious · c8d0d7b6e5478318

MALICIOUS

PDF

87.8 KB Created: 2021-03-16 04:30:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: d7d7f1072754d0c5bb671a03c1580e33 SHA-1: 862499439fee52634dc52e03249b0975e5503e03 SHA-256: c8d0d7b6e54783186452bb82cb24fef18afd2fc0631d3a73f536c15b9884ad21

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external URIs and is structured as a link farm, suggesting it's designed to redirect users to potentially harmful content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://ponafet.ru/wix?keyword=surface+water+quality+modeling+chapra+pdf+free+download PDF link annotation
- https://cdn.sqhk.co/vobevufubito/gdejbjc/86632522389.pdfIn PDF document text
- http://ludokebisiw.iblogger.org/lajel.pdfIn PDF document text
- http://specrazreshenie.com/romeo_and_juliet_full_movie_leonardo_dicaprio_youtube5zrl0.pdfIn PDF document text
- http://pumujavebedopa.iblogger.org/elmira_ny_weather_report.pdfIn PDF document text
- http://trydouche.xyz/what_is_the_sociology_of_religion_paradigmo8on0.pdfIn PDF document text
- http://kutakelipaxeb.22web.org/how_to_cook_hickory_farms_spiral_sliced_ham.pdfIn PDF document text
- https://cdn.sqhk.co/xamitarerivu/yLs9Cgc/dream_life_superstar_game_console.pdfIn PDF document text
- http://reduslimitalia-official.site/absolute_value_rational_numbers_worksheetxkphk.pdfIn PDF document text
- http://betmoy57.com/acetate_transfer_sheets_for_chocolaten0ad1.pdfIn PDF document text
- https://cdn.sqhk.co/nemoludajedu/MJ5zhhf/carnivores_dinosaur_hunter_ps3_iso.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_5f4ce521f7614598842016170845398e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/wupagivoz/sasijoleropolaj.pdfIn PDF document text
- https://s3.amazonaws.com/zaxefemebidaz/10252963690.pdfIn PDF document text
- http://toduwez.epizy.com/dakakosarugaloboxupotoga.pdfIn PDF document text
- https://a49a6154-edc8-4132-95a2-c7bb8d673fe9.filesusr.com/ugd/551169_a9ef6c0960b8444e9d88c06e19593a0b.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fosawef/wobajevo.pdfIn PDF document text
- https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_71ebbd8fc66c46d5a118db21fd0f6dbe.pdf?index=trueIn PDF document text
- http://mujunuge.rf.gd/zegupazo.pdfIn PDF document text
- https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_d2c7a0ae0df44aba9cb9dec6b475089a.pdf?index=trueIn PDF document text
- http://pubadaxakefiwi.rf.gd/cours_anglais_d_affaire_gratuit.pdfIn PDF document text
- https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_8afe934be1f54acbab5243eae4f06d1b.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/remeranexe/water_pollution_photos_free.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_off00010b16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B16	5812 bytes
SHA-256: `9dd783e732905cda042e6a9b9ee76b0b4666aa9ee7bc9985c76beabc89dc9a4e`
`font_01_sfnt_off00011ebf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11EBF	2120 bytes
SHA-256: `555d7c16670bb170ea77770741aabe045c1143a3e79289807d4ac512234ce84c`
`font_02_sfnt_off000127f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x127F8	12568 bytes
SHA-256: `75a3ec21d6422e6616dfdd2dcd888ddbf21cab4b683665bd58e36cc8060e4ca5`

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