Malicious PDF — malware analysis report

Static analysis result for SHA-256 6718ed771dc3d325…

MALICIOUS

PDF

76.4 KB Created: 2021-03-21 07:18:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: cad5ee966439cf6017ee34d2ccb3211d SHA-1: 4b86e9b7bb6628c0f870ac3643b38c9da8cf3a95 SHA-256: 6718ed771dc3d32559bc34d55f5166fabff74238184eca65ebd31b27f052120d
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs likely lead to further malicious content or phishing pages.

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://kuzutuzo.ru/strik?utm_term=vizio+tv+e601i-a3+no+picture PDF link annotation
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/sapumotegumigufuke.pdfIn PDF document text
    • http://hookup754.fun/2003_saturn_vue_v612r7f.pdfIn PDF document text
    • https://cdn.sqhk.co/naxenunovus/hAK0njc/super_mario_world_the_new_adventure_deluxe_online.pdfIn PDF document text
    • https://cdn.sqhk.co/zoraxiraga/gjhcpji/46152826313.pdfIn PDF document text
    • http://gradstroy.su/gogowonimerodanigafomubi27013.pdfIn PDF document text
    • https://gebobofivogaxe.weebly.com/uploads/1/3/5/3/135308574/pozesixusisa_tazejetu_tigad.pdfIn PDF document text
    • https://nenesezeli.weebly.com/uploads/1/3/0/7/130775424/wajinunolubevur.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/bagex.pdfIn PDF document text
    • https://nidukonijeso.weebly.com/uploads/1/3/1/3/131381088/4068129.pdfIn PDF document text
    • http://crysety.xyz/2360100175a6ptm.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/ghjbieO/12931780690.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/eggdjgf/turbo_driving_racing_3d_download.pdfIn PDF document text
    • https://verakolor.weebly.com/uploads/1/3/1/3/131379730/2581801.pdfIn PDF document text
    • https://cdn.sqhk.co/zapevexuvot/jiPjfQQ/pencil_sketch_artist_jobs_in_hyderabad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satawakerexe.atwebpages.com/volinafipamameganajeru.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/certificate_web_enrollment_no_templates_found.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/purani_picture_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/puvozowojuniw.pdfIn PDF document text
    • http://girofili.myartsonline.com/17286185190.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.

FilenameKindSourceSize
font_00_sfnt_off0000ec6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6F 5336 bytes
SHA-256: ceb963c15f614b9ff8e4f4c74d41e51ee338d59f6aaa5426c028731d166bab3a
font_01_sfnt_off0000fec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC1 10968 bytes
SHA-256: eeafece325c1e183701b665b81be8b12540bc14eaaa0c8aefa8960c7d70bd643

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