Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8288ed308747db…

MALICIOUS

PDF

78.2 KB Created: 2021-03-22 07:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2bed6a00d5fec1930bcbb16eec6594a4 SHA-1: c290274614eb7501d78b6ddcd965be13051fbfb2 SHA-256: ba8288ed308747db1cde1e2560d142d5f676d7834c2ec823363d687d887611e2
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9997

Heuristics 4

  • 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://dugedepap.ru/123?utm_term=movies+hd+tamil+movie PDF link annotation
    • https://filuloxi.weebly.com/uploads/1/3/2/7/132740414/20487d.pdfIn PDF document text
    • https://xejuzofuna.weebly.com/uploads/1/3/4/8/134858051/1323fdad2c717.pdfIn PDF document text
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/4822695.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_d292996fac2540069a8523663bb1b65d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/zurutufogola.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/addition_worksheets_grade_1_with_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/ligadura_de_arteria_carotida_externa.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/covid_test_center_jobs_liverpool.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/suppression_formation_auto_entrepreneur.pdfIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_a51487b4676841a79d08a2bbaf8a94d8.pdf?index=trueIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_c1a0bcfd1fd34e0c86cd17e33b734db9.pdf?index=trueIn PDF document text
    • https://59548cc9-d6a6-4b2e-bd73-2bfb7290c7b5.filesusr.com/ugd/3fd21f_dc070532f9cf44a48a8b92fd0ac63a99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/80214254744.pdfIn PDF document text
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_d1aa8b613f184dcb97c941b76bf5a780.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wemazun/tafeze.pdfIn PDF document text
    • https://457cefd1-268f-49c0-9ca4-ced5ac281e6b.filesusr.com/ugd/983758_19bd5ba1859143fbb3ae00ce28087764.pdf?index=trueIn PDF document text
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_4e52ca79284948419db23e1b8e489c03.pdf?index=trueIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_9ce2d94767604bf688fd6d0a2035e4f3.pdf?index=trueIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_24a9d81d2fe840468c393c9c6c5cb6b7.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_0412b5ed1dc2431ca7b27e91b2126b8b.pdf?index=trueIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_9e65394a52494439ac0e50b46e9a0a93.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f98c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF98C 3572 bytes
SHA-256: 7d5d1a82d890e94f1030247fbe90128fb8fe9998a4fdcc634ec26a1c775109df
font_00_sfnt_off0000e887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE887 5032 bytes
SHA-256: 6b32e5ce05f6393cacddbf9363b479461b559161e365da3e8ddf70d6a0dd4eb0
font_02_sfnt_off000106f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F9 10656 bytes
SHA-256: 4f48e3452de3fd8f60142467ffeebe1dc972b54d882a77eee1a5adc367316e76

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