PDF malware analysis — malicious · 8bbb1d7cd834c90a

MALICIOUS

PDF

81.4 KB Created: 2021-04-02 16:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 31b82b8e0222cb3df8d7420185330f71 SHA-1: 70dc646f6ab9d69a42564de6d868730ce4cca3e9 SHA-256: 8bbb1d7cd834c90a3757df82e09292c11303fc8ee0b5d0af3177ec00f3e7811a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one heuristic specifically identifying a 'link farm' designed to direct users to a large number of other PDFs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and extensive external linking suggest it's designed to redirect users to malicious sites.

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 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.
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://midufefew.ru/aws?utm_term=sony+car+radio+turn+off+demo+mode PDF link annotation
- https://tuwazumabokanif.weebly.com/uploads/1/3/4/6/134611666/wosuxujedogofi.pdfIn PDF document text
- http://stat-index-co.com/hp_laserjet_p4015_printer_cartridgexrn8d.pdfIn PDF document text
- http://gifavojam.scienceontheweb.net/unir_varios_em_um_s.pdfIn PDF document text
- https://vokufasel.weebly.com/uploads/1/3/4/8/134872836/5662a865229d78c.pdfIn PDF document text
- http://persequenteamsohbet.com/vujagotowitabakowirelhslik.pdfIn PDF document text
- http://cosmeteca.com/candide_by_voltaire_sparknotesksssk.pdfIn PDF document text
- https://kefonajivivuz.weebly.com/uploads/1/3/0/7/130776591/7423655.pdfIn PDF document text
- http://wonizojaru.scienceontheweb.net/xewulepatatewulugolupokem.pdfIn PDF document text
- https://labuxodapiju.weebly.com/uploads/1/3/4/4/134492440/0f273da0d.pdfIn PDF document text
- https://zigamebujadosa.weebly.com/uploads/1/3/4/7/134745820/perijanuwi.pdfIn PDF document text
- https://wojulifurezusek.weebly.com/uploads/1/3/1/4/131438898/wixoxoxijubet-tivikajerox.pdfIn PDF document text
- https://mufamemibota.weebly.com/uploads/1/3/1/8/131856380/denavezitogajufipevo.pdfIn PDF document text
- https://fanedidunosav.weebly.com/uploads/1/3/5/3/135345804/piruxodepoxor.pdfIn PDF document text
- https://dogerisu.weebly.com/uploads/1/3/0/8/130874322/lamumigipuzi.pdfIn PDF document text
- http://dororuminaxa.mywebcommunity.org/in_what_order_were_the_harry_potter_books_published.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://s3.amazonaws.com/votawawo/backtrack_5_apk_for_android.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fac8a314-0352-4b6a-9898-cccd0a82f31c/how_are_artistic_skills_developed.pdfIn PDF document text
- https://s3.amazonaws.com/zumezeviwakiz/lenovo_ix2_reset.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/766eede6-c2fb-4b00-bade-2b04659be55d/simulation_and_simulacra_jean_baudrillard.pdfIn PDF document text
- https://s3.amazonaws.com/zuxime/22356946233.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/967ac90d-a717-43f9-ad43-d11987b45272/big_little_lies_season_2_australia_how_many_episodes.pdfIn PDF document text
- https://s3.amazonaws.com/piwanisaj/lamuxaxosexulesi.pdfIn PDF document text
- https://s3.amazonaws.com/radubozufiwo/in_their_eyes_were_watching_god_janies_character_development_constitutes_the.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_off0000f44f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF44F	5044 bytes
SHA-256: `300b9e3e6d44bf900c4e8015aa10b49722276ea217f60a06dcfe7b036af34b62`
`font_01_sfnt_off00010558.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10558	10732 bytes
SHA-256: `af29f2bf6a3c514ef2d55bccb95062776de93fb7372cca2186b26d5f61461abd`
`font_02_sfnt_off00012a1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A1A	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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