PDF malware analysis — malicious · 19af75d33d231bfa

MALICIOUS

PDF

77.2 KB Created: 2021-03-23 15:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: 3440bc2ce446dbc48529ff3202892254 SHA-1: efaeb8b7073eb6815f2288310480c32e8d809167 SHA-256: 19af75d33d231bfa2aa9722e1266520336f30ad02cb3ba700e0f9f6e5200ea1f

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to disposable domains and potentially malicious PDFs, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the nature of the links suggests a potential for exploitation or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 6

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 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://jacksth.ru/strik?utm_term=how+to+use+relion+ultima+blood+glucose+monitor PDF link annotation
- http://dexaputanit.mygamesonline.org/gizawabawekovox.pdfIn PDF document text
- http://gazajujana.mygamesonline.org/vokudevagijamumuduse.pdfIn PDF document text
- https://sovurides.weebly.com/uploads/1/3/5/3/135349611/tuwiw.pdfIn PDF document text
- https://cdn.sqhk.co/jekidase/DXggRgd/dexizesalagaxufipilup.pdfIn PDF document text
- http://tuvolabuzibode.iblogger.org/mopijubijijijul.pdfIn PDF document text
- https://cdn.sqhk.co/vimexuda/if6HAMm/96676032097.pdfIn PDF document text
- https://wakevilapiz.weebly.com/uploads/1/3/4/9/134903367/kufiji.pdfIn PDF document text
- https://cdn.sqhk.co/rifusofuwedi/Apjgjge/kpop_ranking_september_2020.pdfIn PDF document text
- https://cdn.sqhk.co/minamojazi/jahfgdd/top_scorer_serie_a_2020.pdfIn PDF document text
- https://cdn.sqhk.co/foxoxaze/hIOTbmh/48217846062.pdfIn PDF document text
- http://felagem.getenjoyment.net/pejopumona.pdfIn PDF document text
- https://cdn.sqhk.co/vuvesanap/iaidhcr/pipupixom.pdfIn PDF document text
- https://cdn.sqhk.co/girolivudafo/tzgdjd0/nhl_21_beta_servers.pdfIn PDF document text
- https://wusowekop.weebly.com/uploads/1/3/2/7/132741020/botatekajife-vofovodedez-jagonenuge.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://wugosegonokipuj.rf.gd/solucion_hipertonica_edema_cerebral_pediatria.pdfIn PDF document text
- https://s3.amazonaws.com/tevigotu/frp_bypass_android_7._0_2018.pdfIn PDF document text
- http://vekisofekibote.myartsonline.com/lund_and_browder_burn_chart.pdfIn PDF document text
- https://s3.amazonaws.com/bakoloj/badmash_dil_song_pagalworld.pdfIn PDF document text
- http://gariwenipalupot.rf.gd/family_therapy_assessment_questionnaire.pdfIn PDF document text
- http://dipagepe.atwebpages.com/artificer_apprentice_question_paper_2020.pdfIn PDF document text
- http://lisunamubeso.epizy.com/bullet_journal_calendar.pdfIn PDF document text
- http://zelanokavekav.rf.gd/vutatizogu.pdfIn PDF document text
- https://s3.amazonaws.com/sasufufa/draw_sheet_meaning.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_off0000f0e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0E0	5452 bytes
SHA-256: `0ec9314f6b83f9ba1c7c3c3326779a86fa58e33efab794f713ac1628d4f3b37c`
`font_01_sfnt_off0001035c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1035C	10372 bytes
SHA-256: `ac24df6a607169b36c90ad5fed129754682d9cbd8c8436cc029c17318455754e`

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