Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb98ad73c542dc3…

MALICIOUS

PDF

82.0 KB Created: 2021-02-25 19:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3700fe21d46189b73762e19083cf9c2c SHA-1: b8ade673673d4b174eee21ac332b10ea676c02de SHA-256: 1fb98ad73c542dc3c4232843b901a194fce4387b3144992cf20c6f1af33b4dc9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/strik?utm_term=sacred+geometry+symbols+and+meanings+pdf PDF link annotation
    • https://cdn.sqhk.co/kekazorub/ibvgfl1/dibavovenugexif.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/hepEHHA/earth_now_nasa_app.pdfIn PDF document text
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/runupepelem.pdfIn PDF document text
    • https://gijixejuk.weebly.com/uploads/1/3/4/8/134880041/67202700f9fb7c1.pdfIn PDF document text
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/03c801b093a9d.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/dXXic8X/new_york_guided_walking_tours.pdfIn PDF document text
    • https://totiboliz.weebly.com/uploads/1/3/4/8/134897880/xobiziriruzipirabanu.pdfIn PDF document text
    • https://pigulanofalo.weebly.com/uploads/1/3/1/4/131406379/jupelirefu_mewagopizaba_tegoxe_befobow.pdfIn PDF document text
    • https://turarizamagux.weebly.com/uploads/1/3/1/4/131453837/siverusabogobek-tarezezabufedof.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/doweloronin.pdfIn PDF document text
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/mewupofuxapupop.pdfIn PDF document text
    • https://cdn.sqhk.co/junulevi/ifibKjj/dwayne_johnson_age_12.pdfIn PDF document text
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/684dc2d3a5b4.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/YgfgfEY/el_arte_de_la_guerra_audiolibro_descargar_gratis.pdfIn PDF document text
    • https://munuliwakubife.weebly.com/uploads/1/3/1/6/131637312/8717552.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/bunebinoma.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/national_local_weather_hurricane_radar_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/44816427226.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 5820 bytes
SHA-256: 37e7aa87dd5ad67b65745bec1ac157f1318da92b951172873af6385ee11bcc86
font_01_sfnt_off00011653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11653 10512 bytes
SHA-256: 12b9c28488f7a3caaaa0d05f74852380f07e2d885135c468c76c64daf87cb747

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