PDF malware analysis — malicious · 9b4bdf96fe7a92c6

MALICIOUS

PDF

71.8 KB Created: 2021-03-06 08:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: df8835cca2c1d2ee56e8e1d7aa645842 SHA-1: b2d1158671458f8b2c086cf2e2772bfcf491444d SHA-256: 9b4bdf96fe7a92c64cb1c91f4c68199aec5beafd51b4a5eff134b87b2cdc1078

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many pointing to disposable hosting, and one specific URL that appears to be part of a phishing lure related to 'Marvel movies'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or redirecting users to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lead users to compromised or malicious websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small 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.
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://golowaki.ru/strik?utm_term=marvel+movies+to+watch+before+endgame PDF link annotation
- http://mugedly.xyz/3171862747193v46.pdfIn PDF document text
- http://vipimuxatomefi.medianewsonline.com/losikebi.pdfIn PDF document text
- http://sq11mini.com/162319321938t3ou.pdfIn PDF document text
- http://tovelksa.website/transport_processes_and_separation_process_principles_includes_unit_operations_4th_editionmce5e.pdfIn PDF document text
- http://ijmalan.xyz/latitude_5300_2_in_1nkvfy.pdfIn PDF document text
- http://zitokujamu.mypressonline.com/83412808070.pdfIn PDF document text
- http://linavaluviriv.getenjoyment.net/blood_bowl_list_of_teams.pdfIn PDF document text
- http://taptopbot.com/razajonimefafupometn7jc4.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://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_668410839a64432294e788091f57e47a.pdf?index=trueIn PDF document text
- https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_d94594728c0d4004b2f91244cf84219d.pdf?index=trueIn PDF document text
- https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_e7c63511ae24415e92007fed13d3f6c3.pdf?index=trueIn PDF document text
- http://taguramol.rf.gd/diranikutakapetomuraji.pdfIn PDF document text
- https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_fa8e12704c18488ebdb773a4ca6a3e1f.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/lofese/52249163298.pdfIn PDF document text
- https://s3.amazonaws.com/wovigebi/capitamall_trust_annual_report.pdfIn PDF document text
- https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_a0ec7b3eed46402f845f67656a7604a6.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/levovod/cities_skylines_loading_screen_mod_report.pdfIn PDF document text
- http://vufuwuxe.epizy.com/inverse_of_logarithmic_functions_worksheet.pdfIn PDF document text
- https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_f601448165074ddfa238be0fd92fcd7d.pdf?index=trueIn 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_off0000ce51.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE51	5520 bytes
SHA-256: `d1c2cbe34107a4880b79b47025b74ac06c4000ab5988d8af2cd23b2492d98419`
`font_01_sfnt_off0000e104.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE104	10036 bytes
SHA-256: `d3797c0bbf9f58c31e0a4186a2e72b3ac8b9a565b39438c4827e917cffbf6ef4`
`font_02_sfnt_off00010376.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10376	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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