Malicious PDF — malware analysis report

Static analysis result for SHA-256 6540f69ad3041819…

MALICIOUS

PDF

85.2 KB Created: 2021-03-18 00:17:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e7220a46c4157c96f44b71a60fbe04ac SHA-1: aef71d76fbf83901ef80543f1206508b4ca58158 SHA-256: 6540f69ad304181986d23e75881255c13438c58506e41d3bc6890ab7b6ff144d
186 Risk Score

Malware Insights

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

The PDF contains a link farm designed to direct users to external websites, likely for phishing or malware distribution, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The embedded URL 'https://jumiwimov.ru/wix?keyword=watch+vampire+diaries+season+5+episode+8+online+free' suggests a lure related to popular media content. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=watch+vampire+diaries+season+5+episode+8+online+free PDF link annotation
    • https://cdn.sqhk.co/keridola/difP6jf/nails_open_till_late_near_me.pdfIn PDF document text
    • https://sijodeteketede.weebly.com/uploads/1/3/4/4/134486162/dc543b52fcf.pdfIn PDF document text
    • https://finepeva.weebly.com/uploads/1/3/5/3/135347337/b264e69f21.pdfIn PDF document text
    • https://wawotisusuwo.weebly.com/uploads/1/3/2/7/132741293/8f12a1e144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456116/normal_6052800329c3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_5fe6fe7f00a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413007/normal_6031890f53680.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/ggic8r4/57682810000.pdfIn PDF document text
    • https://pumurepuwalor.weebly.com/uploads/1/3/5/9/135978845/wimesozot-mavaratoliw-pofaveponu-funesol.pdfIn PDF document text
    • https://bigadamedoje.weebly.com/uploads/1/3/1/3/131384249/xazunonam-vunidej-mokusupew.pdfIn PDF document text
    • https://ganepivojo.weebly.com/uploads/1/3/4/7/134774155/2561c071c74.pdfIn PDF document text
    • https://cdn.sqhk.co/givikofuf/gXjahhw/79526810682.pdfIn PDF document text
    • https://mifopubulu.weebly.com/uploads/1/3/1/6/131637027/fukilivax-tadikiguvone-pojox.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/hfjbNhf/basketball_timeout_rules_nba.pdfIn PDF document text
    • https://japewilipo.weebly.com/uploads/1/3/4/4/134471591/6754503.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_2a4d755494a849cf86e470562557f749.pdf?index=trueIn PDF document text
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_cf9eb6707d11441dbfee90f564f47161.pdf?index=trueIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_67b7e1168afc4956947730a6a025e385.pdf?index=trueIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_229a1f7a265b42c8b4a61f9d13458d0c.pdf?index=trueIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_fe3bda8a2abd489fb83b55078bb4167e.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_b485acc246a14466bf3662ca3cd5ab9d.pdf?index=trueIn PDF document text
    • https://2ac8321c-28d8-41c8-ac7a-99137a6fe030.filesusr.com/ugd/157ee0_fedd6a6ae3e64d7192f78c14de74f6f1.pdf?index=trueIn 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_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 5784 bytes
SHA-256: 23442cef7312fbb06e5678b8e495ddee99da85ddd00a86fdac2d7421ac6fa711
font_01_sfnt_off00011e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1C 12132 bytes
SHA-256: 8aee353f32f56d5e221106ca7044d317aa59a0d71529a2197ac2e304f489f81a