Malicious PDF — malware analysis report

Static analysis result for SHA-256 227fca2b50b401d1…

MALICIOUS

PDF

80.3 KB Created: 2021-03-18 04:36:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 63af7325882de8f3d5d195da62cf102e SHA-1: 02e665aaba5dcfc52b754a812bf8af0880c9e05c SHA-256: 227fca2b50b401d1175fc4936379e9004d41455144088c98740d09502ea96c0f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs and the PDF structure itself point towards an attempt to lure users to malicious content or exploit vulnerabilities.

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://bologen.ru/award?keyword=oracion+a+san+miguel+arcangel+para+proteccion+pdf PDF link annotation
    • https://cdn.sqhk.co/dedesonor/JjgJidG/rugeluwexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497372/normal_60125016f1c64.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/ffVgiZk/drift_stunt_twister_car.pdfIn PDF document text
    • http://shlifovka-pol.website/67746263975yt19p.pdfIn PDF document text
    • https://wuvobarapupi.weebly.com/uploads/1/3/0/8/130813490/wakipevameneze.pdfIn PDF document text
    • https://mavulirapiba.weebly.com/uploads/1/3/4/7/134741644/buvawizapa.pdfIn PDF document text
    • https://tikobivit.weebly.com/uploads/1/3/1/3/131382680/bojebisez-birotabuduziju.pdfIn PDF document text
    • http://generatorsale.ru/jidivenh78bo.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/bjjG7SD/global_warming_causes_and_effects_essay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_6052aa36e45af.pdfIn PDF document text
    • https://pelabomorifij.weebly.com/uploads/1/3/4/6/134628360/3935e3.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/hchuxhj/62246524910.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/a06hfjh/dune_bashing_in_dubai_flash_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_a86664a3543c40c3bf625a292ff4b22c.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_98f1c7508d9b400f8ec5d66691391301.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/59560175944.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/bootstrap_3_material_design_template.pdfIn PDF document text
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_a01ce8d6e5694da4850bb96f0b6c82a9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazopaju/axon_7_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/acknowledgements_examples_for_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/interpretation_of_data_research_report.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_off0000f351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF351 5504 bytes
SHA-256: 4e364af8839f4c2cd0b8c32ea7499f767617f91277a1b00f67fc834077b633ca
font_01_sfnt_off000105ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EE 13312 bytes
SHA-256: a1f288925e27c4840d4339a7460c264d97b23dc049a8ac0fa38d37528712cf62

Open this report in the interactive analyzer, or submit your own file for analysis.