PDF malware analysis — malicious · 8cefcada73e28a26

MALICIOUS

PDF

78.0 KB Created: 2021-03-12 10:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: da85b6282dc3a7e604ce9f5abcc7b451 SHA-1: bd1b957cc1d23d5096be9571faf187bc5fe72131 SHA-256: 8cefcada73e28a264e2b79867edaa6796355b7a3611242b4b5b871503a0db12c

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The presence of external URIs and the 'link farm' heuristic indicate an attempt to redirect the user to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/award?keyword=blue+eyes+technology+pdf PDF link annotation
- https://cdn.sqhk.co/fajoliteve/wbDzLih/tifamegitewegorutu.pdfIn PDF document text
- https://cdn.sqhk.co/duromivap/bIcLhi7/camas_antigas_de_madeira_reformadas.pdfIn PDF document text
- https://cdn.sqhk.co/ralapogifur/srHfidt/bride_and_groom_cake_topper_amazon.pdfIn PDF document text
- http://korecos.ru/bertazzoni_microwave_manualh6l9s.pdfIn PDF document text
- https://cdn.sqhk.co/falugojafat/brhhij6/naia_head_basketball_coach_salary.pdfIn PDF document text
- http://mabay.fun/argumentao_jurdica02bfd.pdfIn PDF document text
- http://rizovog.iblogger.org/plantronics_ml2_bluetooth_headset_reset.pdfIn PDF document text
- https://cdn.sqhk.co/kogeledewafo/fhhjhgh/23515126850.pdfIn PDF document text
- https://cdn.sqhk.co/gederanew/iADo3ja/earn-_to-_die-_2012_20_hacked.pdfIn PDF document text
- https://cdn.sqhk.co/zegofurop/hfiggiZ/822562080.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411228/normal_5fe993840646b.pdfIn PDF document text
- http://damvglaz6.xyz/sims_4_wwe_modkx08x.pdfIn PDF document text
- https://cdn.sqhk.co/bujasugawo/24JNWhd/swing_go_launcher_themes_apk.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4497685/normal_5fe09abd0d13f.pdfIn PDF document text
- https://cdn.sqhk.co/sifolilo/PJgc7hi/descargar_tic_tac_toe_glow_apk.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://sogirexulurika.rf.gd/advanced_excel_course_file.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0f63b0f4-b11d-434c-ab19-ad5e385458f7/gateway_dx4860-ub33p_motherboard_specs.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3a4d8bda-b4a3-4e20-9ba1-c2018b0d667a/xokobuvalorefiromasopas.pdfIn PDF document text
- http://dobevux.epizy.com/beauty_and_the_beast_bookends.pdfIn PDF document text
- http://girupesoja.rf.gd/zinawuxofud.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cad8adce-fbd1-40ea-9a73-ee07c0829ae2/how_to_connect_brother_printer_to_wifi_hl-l2360dw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5ed7b00e-dab1-48d0-b8ed-af04be669ad3/what_not_to_eat_when_detoxing.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e42ec97a-12c7-45a5-afd1-3f402f1e14b5/85238624377.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_off0000e708.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE708	5096 bytes
SHA-256: `810f5e1f0213da9f8ce73aacb736a01ff6978abd146ed792d7c8d6b5d62aec15`
`font_01_sfnt_off0000f86a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF86A	10868 bytes
SHA-256: `7bfab5e4d592f46b3c834e3c9668df78fb79cdeb7175faff1fb1ce0ab00d7895`
`font_02_sfnt_off00011cc5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CC5	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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