Malicious PDF — malware analysis report

Static analysis result for SHA-256 16fd970e29c3886a…

MALICIOUS

PDF

76.1 KB Created: 2021-03-30 07:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 44ee426aab42d1a573cf7a86c3cf88ee SHA-1: 119eded7ad2dff6743eba888967985c394b796fb SHA-256: 16fd970e29c3886ab83516b45838ac1154d81d9e9f88959aecb2fd593026c1f4
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 0.9990

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://pelibifir.ru/wix?keyword=mongoose+xr250+review PDF link annotation
    • https://cdn.sqhk.co/bezupidokaz/jcbnjbk/ligalefenutux.pdfIn PDF document text
    • https://nupebovewurezo.weebly.com/uploads/1/3/2/7/132710783/235a47d74.pdfIn PDF document text
    • https://geripefuni.weebly.com/uploads/1/3/2/7/132740274/331427a436ee32.pdfIn PDF document text
    • https://wisiwojapano.weebly.com/uploads/1/3/4/8/134896472/fudopipopigijus.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/hgjqzgf/9813582617.pdfIn PDF document text
    • https://binazofew.weebly.com/uploads/1/3/4/7/134766703/folumidaw-jalizoto.pdfIn PDF document text
    • https://paxobafu.weebly.com/uploads/1/3/4/6/134697986/624c6504c85.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/04f56713986235.pdfIn PDF document text
    • https://voxukosobezut.weebly.com/uploads/1/3/4/8/134846839/riwokakom_jabama_tibolejitu.pdfIn PDF document text
    • https://gewavidabu.weebly.com/uploads/1/3/0/7/130775927/5465763.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/povelenavuviw/love_good_morning_pics.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/sharp_aquos_tv_user_manual.pdfIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_dd3eed64e6d7428293d00c9a27c57749.pdf?index=trueIn PDF document text
    • https://0face946-3507-4f1d-9804-30df5ac990e4.filesusr.com/ugd/8dfcc1_c94adc7c33a049c59c2ca548b9352834.pdf?index=trueIn PDF document text
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_31a3d13e6fc2488ab8076ff6bf64db71.pdf?index=trueIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_4d9b8714e4c945cea636ab7cf76e8b10.pdf?index=trueIn PDF document text
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_599185f5f2a94685a773c9cbd50a0af7.pdf?index=trueIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_d3a6b62c0db94c2b8d9f576ce914e381.pdf?index=trueIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_af620441b96b4666acc9534ddb8dd418.pdf?index=trueIn PDF document text
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_12d4bd0d3843410da74535c7a0d432ce.pdf?index=trueIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_cbea2a9a0d4745c98dceeab936618a53.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/bajulilosotaxikoxoravovon.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/how_do_i_factory_reset_my_iphone_6_plus_with_itunes.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/bayesian_data_analysis_book.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_off0000e89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89E 5232 bytes
SHA-256: 3dea5872aa43ebef3101e649a32337dd8212b828210c3d5a2450858ba65d2791
font_01_sfnt_off0000faab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAB 11656 bytes
SHA-256: efa3c8af5917e391304816bac2e93587e277e68143a16ce99d04fccaf57c9f88

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