Malicious PDF — malware analysis report

Static analysis result for SHA-256 d411236ceb393687…

MALICIOUS

PDF

71.9 KB Created: 2021-03-18 16:53:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 23f026db85eab4baf4931ead6f1d5751 SHA-1: 1782a66db987e9db835226a7d71e6a9ca06220ae SHA-256: d411236ceb39368763fd6ed7d5db0da5fabf9207beca9e991d7c0cf0268e4d61
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://druttle.ru/wix?keyword=diamond+club+baseball+vestavia PDF link annotation
    • http://ufenmac.com/plantronics_c052-xd1_manualkiehu.pdfIn PDF document text
    • http://adv-workshop.site/game_maker_language_tutorial7eaaa.pdfIn PDF document text
    • https://diwolusetu.weebly.com/uploads/1/3/5/2/135299278/f0547f46d9556.pdfIn PDF document text
    • http://instapriz24.online/sibumesedazololagoxani8ohp3.pdfIn PDF document text
    • http://hightrade.club/solicitud_ante_la_secretara_de_relaciones_exteriores_para_una_empresa75pap.pdfIn PDF document text
    • https://leresidatebij.weebly.com/uploads/1/3/0/7/130776374/potenuzep.pdfIn PDF document text
    • http://gvidilon.ru/calculus_for_dummies_for_dummies_lifestyle_2nd_editionewwvh.pdfIn PDF document text
    • https://puzelosepe.weebly.com/uploads/1/3/5/3/135317481/mibutejiga_vofekajexo_zakabajatinote_xukiraroxigef.pdfIn PDF document text
    • http://romeoplanet.club/how_to_be_gratitude8tqoc.pdfIn PDF document text
    • https://bodonovovo.weebly.com/uploads/1/3/1/6/131607174/1e27612ccd8.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/does_a_vizio_smart_tv_have_bluetoothok1bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nepogewapiw.epizy.com/2420607534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74c28af0-a440-4a47-bfb0-4d51d8c5f8e5/64276270548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5362d331-cc2c-4712-8a99-795df11a05f2/how_to_paint_by_numbers_for_adults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df08a0d1-69e9-472d-a541-559ad08a6e70/xidop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1bccfc5-74eb-45d0-99dc-debc20da032c/57714339022.pdfIn PDF document text
    • http://kavotipuwevir.epizy.com/global_energy_architecture_performance_index_report_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4910938-834c-4642-a1f6-2cf5d6cbceca/31847402128.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_off0000dc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC40 5188 bytes
SHA-256: 3236faf3b31a9d9f93db92a4e261304a9b793088d9fe6fa3fad0cc31c84d8706
font_01_sfnt_off0000eddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDF 10800 bytes
SHA-256: 8cbfb27036e872a1fdb15a812c63da8164e267b0ddcddfe2f2762bac445e4576

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