Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d67e868931a9f3b…

MALICIOUS

PDF

73.8 KB Created: 2021-03-09 04:11:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 00d44c7ecc58d5fa7d9cb5bd17748f99 SHA-1: 9be409853a278a89499b4c7ed5d7148e34670548 SHA-256: 6d67e868931a9f3bed00d26670875f4c5d936e0cc8861f90e52beec1b12e86c8
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 0.9997

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://leonvi.ru/award?keyword=adverbial+clauses+of+reason+pdf PDF link annotation
    • http://avit0.pro/370955127651rgyc.pdfIn PDF document text
    • http://blancop.xyz/braven_brv-_1_bluetooth_speaker_manual488ne.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/3383467.pdfIn PDF document text
    • https://cdn.sqhk.co/lofakekaf/UIjf0lH/80567754980.pdfIn PDF document text
    • https://katokilewiwimi.weebly.com/uploads/1/3/4/8/134846457/lopukuruvopod_demubokig_parawagixizil.pdfIn PDF document text
    • https://zegaturivelegob.weebly.com/uploads/1/3/1/4/131437779/2a43eebd67bb9.pdfIn PDF document text
    • https://cdn.sqhk.co/nukunudakiju/1iigdhe/bsnl_4g_recharge_plans_maharashtra.pdfIn PDF document text
    • https://tikobivit.weebly.com/uploads/1/3/1/3/131382680/wirowaman.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/lphdD1s/19747017823.pdfIn PDF document text
    • https://puxugewukuniw.weebly.com/uploads/1/3/4/4/134492634/kitofanuk_wuzetakoj_newipuwilivar.pdfIn PDF document text
    • https://lusebedadejaxid.weebly.com/uploads/1/3/1/4/131407110/6695d599.pdfIn PDF document text
    • https://bidelokezigakal.weebly.com/uploads/1/3/4/3/134342752/685c5789714.pdfIn PDF document text
    • http://mir23.xyz/international_classification_of_diseases_icd-11gkjyv.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/GidUigl/vigoxaladej.pdfIn PDF document text
    • https://torusakewojowep.weebly.com/uploads/1/3/0/8/130814967/4925453.pdfIn PDF document text
    • http://pinegrvuig.fun/superhero_avatar_creator_appjfe7q.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/wujapu/fujixufoz.pdfIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_e0479b81dbd74ce49a5c76f72d904c6e.pdf?index=trueIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_2f413033d04f45bcb9c21773a98170e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dozore/zonolikebaxaturuza.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_off0000e4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DE 5340 bytes
SHA-256: 50c1cfcdbc9d591610e29567b28b8785d81b9f2eac5ef43081f5f5967e62ab8c
font_01_sfnt_off0000f719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF719 10188 bytes
SHA-256: ec051a252bcf1f55ba8bb864da5ce0f0a3bb8a28960e24e02ac2b30f51307f5a

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