Malicious PDF — malware analysis report

Static analysis result for SHA-256 69083b8e45530df3…

MALICIOUS

PDF

77.9 KB Created: 2021-03-08 22:21:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5543ba0f5ff99314c5004f766dd8d152 SHA-1: bc63d1eb4c384cbf8a6bb2dbd0f5bb0a6544275e SHA-256: 69083b8e45530df33a4e577d908e1d6a237432198a5fc18a4f0da3c0a716537b
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, a technique often used for SEO farms or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/award?keyword=gastrulation+in+frog+and+chick+pdf PDF link annotation
    • https://gezameluloxeg.weebly.com/uploads/1/3/5/3/135393377/1321731.pdfIn PDF document text
    • https://xuwosanilenerev.weebly.com/uploads/1/3/4/9/134900173/ravuwib-zatugozinixuxa-lufize-fowowituwuduj.pdfIn PDF document text
    • http://mifvideo.space/70441142892y9ovd.pdfIn PDF document text
    • http://habercigo.com/jugufenuwovijogifexule45w6l.pdfIn PDF document text
    • https://vakakarixo.weebly.com/uploads/1/3/4/5/134590502/4028209.pdfIn PDF document text
    • http://chtotakoebezuz.biz/septima_estrofa_del_himno_nacional_de_honduras_explicacion156u9.pdfIn PDF document text
    • https://busununivid.weebly.com/uploads/1/3/4/7/134774072/7386316.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/ecpgXgj/16186055030.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/uIi6uij/fidapunedexuliponon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/davubewu/delta_pilots_reporting_light_chop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37a5af7-7a86-4495-afbb-4d17e745edaf/13596024439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8602901-b52b-446a-ab3f-25cd21655b96/97823009963.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/all_50_states_in_alphabetical_order_song_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/gukafevavaf.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/nomat.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/constitution_bill_of_rights.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/21067984101.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/microbes_in_human_welfare_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/30770257260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68792b8b-dfff-4979-9a1b-34476fe5a772/josekidatuluralediz.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_off0000f493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF493 5512 bytes
SHA-256: 50d131e9099140b41999651cab983db9a38e5a86b83fb66b36e7a993f5e6b681
font_01_sfnt_off0001074b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074B 10380 bytes
SHA-256: 369cf56d7d4a72e5b7f5932b51bc918de07264ed3853ac51bbf61c0fad5fdc74

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