PDF malware analysis — malicious · eb399d8224033ebe

MALICIOUS

PDF

73.8 KB Created: 2021-03-05 11:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 46ff9dd39a1a4ce63eb69b8ae35b4018 SHA-1: 15ec908e81b726ec08880cdd7ac0ec472ebe8bcc SHA-256: eb399d8224033ebecba8d65bf5f17698a45b60f4439c98dff807b589cd73cfd7

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, a common tactic for SEO link farms and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is part of a larger scheme to redirect users to malicious content, likely a phishing page or a malware download.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://maypoin.ru/wix?keyword=ellipse+worksheet+algebra+2 PDF link annotation
- 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/zugutixe/86092326722.pdfIn PDF document text
- https://s3.amazonaws.com/bubodeliza/sujajogitowovud.pdfIn PDF document text
- https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_b9c6eb52f8a041b9b622a274b7b1c82e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fonazuzixagizir/resurusafamuna.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/754ccf50-da72-45be-83cb-7331808fd872/21575841131.pdfIn PDF document text
- https://s3.amazonaws.com/nosepevozux/67035646459.pdfIn PDF document text
- https://s3.amazonaws.com/gomakobez/loguxexik.pdfIn PDF document text
- https://s3.amazonaws.com/bejexe/86053519759.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3816f4f6-f822-4ef7-8c88-b71c3fd9b401/titobisubuv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1bf64777-d07a-4d82-a34f-0408ef8a0b34/florence_scovel_shinn_audio_books.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1bd70d8d-5b1b-453e-893d-e69bddeb18e3/fisakizidaguti.pdfIn PDF document text
- https://s3.amazonaws.com/rujimidujek/dulajobaxixazinubavoxaru.pdfIn PDF document text
- https://s3.amazonaws.com/bejenosugede/audio_technica_at-lp60bt_pairing.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/191c11f3-8dfc-4d51-ae24-99eef5a9caa6/kx_250_price_in_south_africa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dbc164b2-bc8d-4caa-9d3f-0489704b78f2/21388338709.pdfIn PDF document text
- https://s3.amazonaws.com/supefujoxopubu/29432350739.pdfIn PDF document text
- https://s3.amazonaws.com/bulolimepol/12082017280.pdfIn PDF document text
- https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_2d5c574eaea941efb32f87bd5d25b621.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tuzamada/thermal_grizzly_kryonaut_high_performance_thermal_grease.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5e190911-0c35-45c6-b0c1-17e790a7b6eb/la_leccin_de_august_resumen_largo.pdfIn PDF document text
- https://s3.amazonaws.com/wumodukubaru/zojoverulumakusorefudula.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c706cb92-a0c2-45b9-a774-813fac81cf6e/there_are_three_types_of_compound_words.pdfIn PDF document text
- https://s3.amazonaws.com/wurivuve/63042567859.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_off0000d739.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD739	5148 bytes
SHA-256: `82ccc372466667b388d0c861f5d98ca22570fe89e066ca98dc423380ae2f42c7`
`font_01_sfnt_off0000e8dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8DD	10324 bytes
SHA-256: `586a88a083d221e90abf63cf6608359d48328cb2262a7548321deb33f7c104ca`
`font_02_sfnt_off00010bcb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BCB	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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