Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb09f81826da5c6…

MALICIOUS

PDF

79.2 KB Created: 2021-04-16 03:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f31cf25b82c9a61ce8051edb6e7776f2 SHA-1: 2216d1c1f5f756d3786e53e784413644998c5725 SHA-256: 7cb09f81826da5c655dfc2d5228bcd91353094a16be76386bb5fa5f9876ada03
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though partially corrupted, includes a search query related to Ryobi leaf blowers, likely a lure to disguise the malicious intent of directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nipisod.ru/strik?utm_term=how+to+clean+carburetor+on+ryobi+leaf+blower PDF link annotation
    • http://gedozudusinap.mygamesonline.org/ielts_writing_task_2_assessment_criteria.pdfIn PDF document text
    • https://pagowabelada.weebly.com/uploads/1/3/0/8/130874520/0d40dd5d1225982.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/does_v_shred_work_reviews.pdfIn PDF document text
    • http://xunetokawetik.sportsontheweb.net/chemotherapy_for_prostate_cancer.pdfIn PDF document text
    • http://vurejowug.mypressonline.com/gedemoxiravudisenifekom.pdfIn PDF document text
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/974852f1.pdfIn PDF document text
    • http://wulixiv.sportsontheweb.net/plaquetas_bajas_en_perros.pdfIn PDF document text
    • http://gigezesuzobe.getenjoyment.net/domuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tevefetilojas.atwebpages.com/listado_de_los_verbos_irregulares_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a4e8f9-a5d3-4028-8961-f6a6742714a0/dyson_mini_motorhead_review.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_b2882e9857e140bdb0e532a7d875b66e.pdf?index=trueIn PDF document text
    • http://lavapokapajemob.myartsonline.com/17297624863.pdfIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_88458fdb531042159427d6950f096d18.pdf?index=trueIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_3c453633bb4a4ae980abf8280105f923.pdf?index=trueIn PDF document text
    • http://gepivefukusi.atwebpages.com/pebobasusomezafedax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da6856c0-d844-4ab9-9f1e-6724f9ffb637/newuxujowirimedaxovakeg.pdfIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_a433b45a2fe140ccb5babf4dcbae89cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90a75e0-c1f7-4428-b3c7-54c1519c72cc/driver_de_scanner_epson_gt-s50.pdfIn PDF document text
    • http://woranuganavot.myartsonline.com/jabowekolarabupob.pdfIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_92a8c7c62ca441419b639ebd44562ad3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/805b3c81-3f65-4d40-b2a0-477b2b33c047/colt_ar15_carry_handle_scope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6f9fd8-1606-4bb8-8520-abd62ff440b6/best_fidelity_mutual_funds_for_retirees_2020.pdfIn PDF document text
    • https://93641f3c-03d3-4c8c-b6db-0fd9bfabe798.filesusr.com/ugd/384ca7_bff1a8b6c50e424c94886896fd2f7932.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_off0000f8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B3 4992 bytes
SHA-256: 9117658894f3b41dd27a62e3e464d5e08a8e315370bfb6808ab99dd7568dcbbe
font_01_sfnt_off000109d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D9 10836 bytes
SHA-256: 584152a34a56b354d890133c49bc6555b48244b44e3fd30dc62717f186697a54

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