PDF malware analysis — malicious · 9a6e35e820c4d0cd

MALICIOUS

PDF

78.0 KB Created: 2021-04-22 00:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 235df88007c8e6cb7676f8139fa0b5fe SHA-1: 508b1f385e60d9b54c8d790dbb7018f041918af4 SHA-256: 9a6e35e820c4d0cdaa16dcce94df7de27260c415afdd6a5dee5e7b4499232a65

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It impersonates a cloud document lure, directing users to external URLs that likely host further malicious content. The presence of numerous external URIs and the link farm heuristic indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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 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.
Cloud document impersonation lure medium SE_CLOUD_DOC_LURE

Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
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://xajibur.ru/strik?utm_term=how+do+i+install+microsoft+office+2016+for+free PDF link annotation
- https://cdn.sqhk.co/vozaxodep/hhdhgI8/cars_2_video_game_cheat_codes.pdfIn PDF document text
- http://mybestchan.online/jiwonbcsvz.pdfIn PDF document text
- https://cdn.sqhk.co/fuwegamuvev/bghibhh/libukezezigapiket.pdfIn PDF document text
- http://idealslim-ordina.site/wupafijaputoritemacxvuq.pdfIn PDF document text
- https://cdn.sqhk.co/jozanafe/7gemieB/12149039524.pdfIn PDF document text
- http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
- http://jijibujubogogi.iblogger.org/rifapebufepijalovuve.pdfIn PDF document text
- http://votixibutiro.medianewsonline.com/romanticism_poetry.pdfIn PDF document text
- http://naropiwazufilu.22web.org/muwasazak.pdfIn PDF document text
- http://fakurivevid.scienceontheweb.net/carboxiterapia_beneficios.pdfIn PDF document text
- http://goproonly.com/90130982601y3wo8.pdfIn PDF document text
- https://cdn.sqhk.co/josozudibud/ihe3ZzS/rofozujoviwevakal.pdfIn PDF document text
- http://vannabanyavsedela.xyz/complete_symmetrical_patterns_worksheet_ks1oe6sr.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/a5a275d0-6a3b-43e9-9950-36e07021da46/vagijiwatizinip.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/713870b5-94fc-48ac-9a69-a1a2fb81f7da/zukixuvafoximeramin.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/948e0f8b-8d1f-4a8a-ba93-6b6f4bccec53/75644346809.pdfIn PDF document text
- http://gixezatisebozus.epizy.com/fikeforixitinevewowimudap.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/afa4f7ce-235d-408e-bd43-9b854b299e80/body_rider_dual_trainer.pdfIn PDF document text
- https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_f4e2e5c5d9b74839a5d7e1b7b22c5f04.pdf?index=trueIn PDF document text
- https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_4031226edad14979917ba9e99b8dd568.pdf?index=trueIn PDF document text
- http://dexadusoxeb.atwebpages.com/8825600247.pdfIn PDF document text
- https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_49315361e49f4bffb7f200b44719d0ac.pdf?index=trueIn PDF document text
- http://semowomeso.onlinewebshop.net/sopoku.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_off0000f144.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF144	5700 bytes
SHA-256: `37ab5e2784d8a954cbccf5d6f406a91cf7361e05570d345286ab72cf00fa8c7a`
`font_01_sfnt_off000104a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104A7	11064 bytes
SHA-256: `e9bb4987e29c6bb4974ab8bbe9bb36fd68fcbec6ecf379d975bfb9b188a5faee`

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