PDF malware analysis — malicious · 40f11304209e2b99

MALICIOUS

PDF

77.8 KB Created: 2021-04-01 17:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 0fcada22609f577916edaa74b8a326d9 SHA-1: 894a66668977eb89c2311ea55f051039071c2da0 SHA-256: 40f11304209e2b99a9d9093a55a73d203299a3cf23ccdf1e926202669fa17f8b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing lure related to 'Aetna better health of Florida forms'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host multiple links on disposable domains, a common tactic for distributing malicious content or conducting phishing campaigns. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/123?utm_term=aetna+better+health+of+florida+forms PDF link annotation
- http://wunadimizurened.medianewsonline.com/dekizif.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456135/normal_6059d38829216.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475730/normal_6049b56fdf04e.pdfIn PDF document text
- http://xonitaj.mywebcommunity.org/diarios_de_motocicleta_movie.pdfIn PDF document text
- https://xuredetinumimo.weebly.com/uploads/1/3/4/6/134630251/betudaligenumigijav.pdfIn PDF document text
- http://mokaxizekebade.scienceontheweb.net/66423633745.pdfIn PDF document text
- https://dovoviwum.weebly.com/uploads/1/3/0/7/130776035/76f0a3e63f09372.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4467322/normal_60266abfd2bc3.pdfIn PDF document text
- https://zawibovime.weebly.com/uploads/1/3/2/6/132681883/rorepitu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4451954/normal_6005c15354147.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426262/normal_605d9117ee648.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://dijejewilibafux.onlinewebshop.net/bodybuilding_exercise_chart.pdfIn PDF document text
- https://s3.amazonaws.com/mulerux/football_training_drills_with_ladders.pdfIn PDF document text
- https://s3.amazonaws.com/kawotexulozax/saris_fluid_2_trainer_vs_cycleops_fluid_2.pdfIn PDF document text
- http://ragigixo.epizy.com/87506924064.pdfIn PDF document text
- https://s3.amazonaws.com/zumezeviwakiz/islamic_quotes_in_malayalam.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2762b99f-d93f-446b-a20f-fc8ca9398a25/whats_a_good_calzone.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3bfe9dab-b352-48ab-b95b-b1b2bae3b1d3/mcsa_windows_server_2012_r2_administration_study_guide.pdfIn PDF document text
- http://rabatelekovufar.myartsonline.com/bagawe.pdfIn PDF document text
- https://s3.amazonaws.com/pajukovuxetu/woxaven.pdfIn PDF document text
- http://jurixosemur.epizy.com/55105024585.pdfIn PDF document text
- http://fopaguduvogo.rf.gd/drill_guide_bushings_for_sale.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9fe8eb69-271b-4d98-8fee-71c62bd0eecc/what_is_the_main_cause_of_peripheral_cyanosis.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c6978596-ff13-4e7d-9087-6070aa92f4c8/nafunuti.pdfIn PDF document text
- https://s3.amazonaws.com/gedexim/tutorial_autocad_electrical_2018_espaol.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f33e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF33E	5276 bytes
SHA-256: `85db9a5f851315f0e2d944a1da4e8b26c920a9e4c33fb5f3d7ca5b9a8d409e6f`
`font_01_sfnt_off00010502.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10502	10760 bytes
SHA-256: `39c21e406ae7df8385eaf5bdd031e023146151856de1e7952f946f73018aa96b`

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