Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4eb18296daceae…

MALICIOUS

PDF

72.1 KB Created: 2021-02-22 00:28:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 36a24f80814c1199c0d81e9946ed7d5f SHA-1: aadfa271a472e135e25be5a0033f541f1d6e7b1d SHA-256: 6e4eb18296daceae0050a1ad85d34b35fa2213c616c643531a78bb40aafd58c3
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be related to the search query 'fighting stances ghost of tsushima', likely a lure to direct users to malicious websites.

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://jottigo.ru/wix?keyword=fighting+stances+ghost+of+tsushima PDF link annotation
    • http://buyervannakupitvsem.xyz/37577573708bctzt.pdfIn PDF document text
    • http://osthondroz.com/lomitotenalakilavenandwr7m.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/jawogovugixegulxyc2k.pdfIn PDF document text
    • https://saletenabij.weebly.com/uploads/1/3/4/3/134339554/c2fb4.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/vuritumukejuge9er0a.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/d3cbef3bd.pdfIn PDF document text
    • https://xupubiwe.weebly.com/uploads/1/3/4/3/134339906/mugusiz.pdfIn PDF document text
    • http://copyright-rules-help.com/punjab_carrom_championship_2018vg7di.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/6332367.pdfIn PDF document text
    • https://dekamukovesu.weebly.com/uploads/1/3/5/3/135324216/xaseb.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/igfhijd/trials_frontier_bike_skins.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/ritumisavp11b.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/senidijozetago_pedonil_kakiro.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/vapirudalarewig-fopadi-kelewerutiw.pdfIn PDF document text
    • http://nikecortez.net/human_fall_flat_ice_level_walkthrough3axif.pdfIn PDF document text
    • https://bitigufej.weebly.com/uploads/1/3/5/3/135337089/1695115.pdfIn PDF document text
    • http://soteguziropuku.22web.org/ignatavicius-7th-edition-medical-surgical-nursing_table_of_contents.pdfIn PDF document text
    • https://zuverikaniwofu.weebly.com/uploads/1/3/4/1/134108987/ferevurakobifut_faparu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1F 5120 bytes
SHA-256: 9430ea20025928688e989209dcd494853f4113d467f790c73c6b3381912a1d02
font_01_sfnt_off0000ef77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF77 10556 bytes
SHA-256: 8d2064d427d754c00e90a923fae30bda300b11b8abaec6cdb206d794c593f4f8

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