Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadcde6e0935f0c6…

MALICIOUS

PDF

81.2 KB Created: 2021-05-06 01:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 51e5ba9283b89af24bf690675c33e400 SHA-1: d1cac24d0e5036f28391fc087cfc391eceaaee35 SHA-256: fadcde6e0935f0c6e1f33739c7f361ffbcb2c922e46372612ccdd448ebaeaf07
156 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is part of a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of a URL pointing to a potentially malicious domain, combined with the PDF structure, indicates an attempt to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://midufefew.ru/strik?utm_term=chloe+13+reasons+why+weight+loss PDF link annotation
    • https://cdn.sqhk.co/xetajikok/zigSGgg/vafivawal.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofigeniso/0jas7e0/rocketman_full_soundtrack_youtube.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/cae04bc9-e052-4c9a-ae84-2ef4f4351e10/borevixal.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/90601527301.pdfIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_79cce570504542c387f424f8ddf1e8b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79dafd1-e29c-43a9-a0af-0d40cd32a116/lista_de_verbos_en_ingles_irregulares_y_regulares_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/bernoulli_s_law_lab_report.pdfIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_fca383e9850f43e692ce0ed1f213f238.pdf?index=trueIn PDF document text
    • https://b7d3a0ae-8059-487b-8826-088776693174.filesusr.com/ugd/8d23e4_71e219a124bf4339a38cd31e69879df1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/bikanapuvunukuzilegeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce541479-623f-420c-81c2-ac425e4e9d36/feziwuzukanenubusokim.pdfIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_9575ddea6ef5486299eef8ba4c15def4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liguwubore/everglow_bon_bon_chocolat.pdfIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_a894d51e918847c48e3cf14e9942da30.pdf?index=trueIn PDF document text
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_b04bdc06ef1a48949033b22d2e6bc845.pdf?index=trueIn PDF document text
    • https://deed868a-3c3f-4b0d-b3ae-f9ebe8a38c33.filesusr.com/ugd/95283b_23042221ab314b888780eb90c9b5c0af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/geraromu/romuzejugarawetefajuvalug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1a86bc-fc4f-49c4-a244-c29bddb8c9de/fundamentos_del_marketing_kotler_y_armstrong_11_edicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de257c67-cb48-4ce0-95a2-2d7ee7e33a01/zusupuw.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/5583786501.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_off00010084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10084 5260 bytes
SHA-256: 1f716d6325a66d9a6def11e3b97a86c5ab0c8ec9cd91294c761b7e69897f6c28
font_01_sfnt_off0001127e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127E 10972 bytes
SHA-256: 77223f9348644ce0b92d021ad92b0e7476d6383ce5749edb61bea35e47f74e83

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