PDF malware analysis — malicious · a0cdf944f96750c0

MALICIOUS

PDF

72.3 KB Created: 2021-03-12 05:54:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: 5e04a898a7a9e68ab91b69668efac47e SHA-1: 3e4790e9db583b54739422137766f6f2160ab12b SHA-256: a0cdf944f96750c0ef0a35f95b1af3e21ac5ab7062c7b10d07a5f54d7fc9939c

126 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, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'nipisod.ru', suggesting a phishing or malware distribution attempt. The PDF structure and embedded content indicate it's designed to redirect users to external sites, likely for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

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.
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://nipisod.ru/wb?keyword=lct%20208cc%20snow%20engine%20parts PDF link annotation
- https://static.s123-cdn-static.com/uploads/4383692/normal_5fd09857f05c3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417992/normal_600369975b92d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476123/normal_6037cb8fd1273.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379970/normal_60355c63596b1.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4372696/normal_5fde21295a65e.pdfIn PDF document text
- https://cdn.sqhk.co/sopaluwokaja/TAO1fIk/doubly_labeled_water.pdfIn PDF document text
- https://cdn.sqhk.co/lobinazema/aZdQigJ/autocad_residential_building_plans.pdfIn PDF document text
- https://cdn.sqhk.co/posebozej/heggcR4/63587706919.pdfIn PDF document text
- https://cdn.sqhk.co/laratakidev/jaAgekR/gesatudoravixa.pdfIn PDF document text
- https://cdn.sqhk.co/wetabupi/ggdy8mm/levolen.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
- https://s3.amazonaws.com/dinigugaxej/how_to_change_colour_on_tecknet_keyboard.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1da22a94-cd74-49b8-9b6c-2745ac5f95d7/27200394145.pdfIn PDF document text
- https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_f3ac02b8e5ad49a7914b7a1cdb0f9668.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/57bf2a31-825d-45a3-8bb7-f0c9d657af20/87047021700.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c0389a7a-88af-46e0-a837-3294e1f573a8/schaums_outline_vector_analysis_2nd_edition.pdfIn PDF document text
- https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_c44bbb42aed14034a1a04ee485ca6dd2.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/kisagoz/23991786871.pdfIn PDF document text
- https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_40eb6f345f5a42fba896b20edf22cec4.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mafavuzenoliki/rapaxategipakume.pdfIn PDF document text
- https://s3.amazonaws.com/tobaziw/allen_carr_method_reviews.pdfIn PDF document text
- https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_99d898dc57b6445d927cc802a9990d82.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/26c930bf-8277-4890-b9fb-5c810c73b643/92368900069.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_off0000d205.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD205	5360 bytes
SHA-256: `a4f4122e7ec97e10c6a434e5c14c552c5d8f4e36768fc92b2332d4e9298d7e32`
`font_01_sfnt_off0000e44f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE44F	9820 bytes
SHA-256: `7ff66c2c9b09d2cd346225475f0224b0ebafd62e6799dfb9fa8ef034857046e2`
`font_02_sfnt_off000105df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105DF	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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