Malicious PDF — malware analysis report

Static analysis result for SHA-256 559fb1355427ec26…

MALICIOUS

PDF

81.7 KB Created: 2021-03-15 04:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bc2145019afaf1562729483198a6b41 SHA-1: 72f67ddaa35838cf35dcea42447282ec061c55c7 SHA-256: 559fb1355427ec2665776dc680b6cb7a17c380ad9a715a747377fbdc13d04c30
214 Risk Score

Malware Insights

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

This PDF document contains numerous invisible and SEO-optimized links designed to lure victims to external websites. The heuristic 'PDF_REPEATED_PAYLOAD_LINK_LURE' specifically indicates that these links are intended to deliver a payload, with one URL pointing to 'https://botokaw.ru/wix?keyword=shop+play+win+codes.com'. The ML classifier and ClamAV detection strongly support the malicious nature of this file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=shop+play+win+codes.com
    • https://cdn-cms.f-static.net/uploads/4449399/normal_603a7cb9045ce.pdf
    • https://cdn-cms.f-static.net/uploads/4418993/normal_601ceebb5ad2c.pdf
    • https://cdn-cms.f-static.net/uploads/4374024/normal_604967bd1a751.pdf
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/d94d3c13.pdf
    • http://idealica-italy.site/48954837018imaig.pdf
    • https://jiraxoxaxizare.weebly.com/uploads/1/3/4/0/134012395/7084599.pdf
    • http://natnat.fun/xipufifesud10vx.pdf
    • http://perevozka.ru/75028917511f62b4.pdf
    • https://cdn-cms.f-static.net/uploads/4425908/normal_604e614a45a97.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_d37b940962b5417dbde6e7016f967b8a.pdf?index=true
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_2c63dffa92094827a14635c1ed7f2f31.pdf?index=true
    • https://s3.amazonaws.com/lopadivupudexa/blue_prism_file.pdf
    • https://cd65756b-a9c7-4cca-9498-1747a6459195.filesusr.com/ugd/05eb20_772fcfee8c58492aab326d8c18c9411c.pdf?index=true
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_9eb2aa5e5022441396d00ce03f083f8a.pdf?index=true
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_582801c60ec74c8099e67bae53aa6b3c.pdf?index=true
    • https://s3.amazonaws.com/tozaduliwubega/name_approval_guidelines.pdf
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_c04dd0279a7a41f4a54ca572632953ee.pdf?index=true
    • https://s3.amazonaws.com/fadupazageraf/biroragijugipixo.pdf
    • https://s3.amazonaws.com/jodabiladezot/sukigosewigepeme.pdf
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_32b04653e02344e7ae9ae55fd98ddb4e.pdf?index=true
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_374956a0f53348c09ce2f319ab46b215.pdf?index=true
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_5ac59d89acfb4e73b88c833a68ab381a.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010109.bin
4ac8ec62d7890bfd9cb6fec9da3564071ccf240bbea48b0d61e941ff064f82ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10109 5544 bytes
font_01_sfnt_off000113de.bin
da378b46ea49bd20417805a099be060599e55f24e7f69d9e720f044ade9425c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113DE 11196 bytes

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