Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad54974dd2133ce…

MALICIOUS

PDF

80.6 KB Created: 2021-05-30 00:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 549d6dd29c4d97817c91f9f963545ac3 SHA-1: b9848f9452c848c9d0f148ee53bfd6be90d151f5 SHA-256: fad54974dd2133cee89890aa518070bb173c1b7ca84bde25aae1237cb6af6cc8
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 0.9994

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://fokemale.ru/strik?utm_term=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+geometry+dash+world+%25D0%25BD%25D0%25B0+%25D0%25BF%25D0%25BA+%25D0%25BF%25D0%25BE%25D0%25BB%25D0%25BD%25D1%2583%25D1%258E+%25D0%25B2%25D0%25B5%25D1%2580%25D1%2581%25D0%25B8%25D1%258E PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371025/normal_6022af037e493.pdfIn PDF document text
    • https://mufebukevep.weebly.com/uploads/1/3/4/0/134096334/3014295.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371023/normal_6006b3d3b1a12.pdfIn PDF document text
    • https://mijeridofuba.weebly.com/uploads/1/3/4/6/134677835/ab9857db932e.pdfIn PDF document text
    • https://zoriliwusitilo.weebly.com/uploads/1/3/4/4/134479822/kudaf_bigini_sipusulubov.pdfIn PDF document text
    • https://duduzigofusu.weebly.com/uploads/1/3/2/8/132815892/betixozuvutamazanune.pdfIn PDF document text
    • https://refedekejevejat.weebly.com/uploads/1/3/4/3/134312363/530099e3c72.pdfIn PDF document text
    • https://jipukikibowema.weebly.com/uploads/1/3/4/6/134633032/dirirepib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474739/normal_5fd3ce35d92a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_6049135f4f9d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459467/normal_604fcf9162222.pdfIn PDF document text
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/4640798.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd350c9a-23f3-4e5e-aba6-9620126dd331/bujoxakevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7154fc2-885c-44a6-951a-e56245b87231/one_flew_over_the_cuckoos_nest_summary_part_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99836304-f7f5-447e-979f-c5e3b472055f/bosasikuzonas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d35091db-37b2-4492-98ad-f9623d5c0bc0/how_to_edit_a_pic_in_paint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4d3073-4d15-417b-8023-536d5ef6d8d5/adjudication_vs_arbitration_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6cd1856-a610-42c8-a19d-8cff76b15535/star_wars_legacy_of_the_force_invincible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2dd9488-4503-4e0c-9f25-90126c2be4d8/john_deere_d140_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78628ba-87c0-42c8-aa60-8915e10b1e1c/toro_timecutter_ss4225_oil_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed67ff8-d346-40ca-a5d0-7eefb611ffaf/implementing_iso_9000_quality_management_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c266986e-7a91-4c2f-9d86-669104a16993/23553523747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4131eff1-015f-4f7b-a5a0-339e8b9155e4/zuzalagalavunesiwitutu.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_off0000ecb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB7 7096 bytes
SHA-256: c269d8bd4b7def739f942e355de7c0b59c0a9c1464981e7224c4c7de29118bb8
font_01_sfnt_off000102ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102ED 15064 bytes
SHA-256: 4576785d920bd2bf9842511346e98a402be134354919d6513a4ef227f2bb43df