Malicious PDF — malware analysis report

Static analysis result for SHA-256 82041701238ee167…

MALICIOUS

PDF

75.4 KB Created: 2021-03-06 19:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 17e458d1f53b7b7fb5f4ce26b70c7dea SHA-1: d39dbb07a66452bf6a7fdc17bcd68bdedf7a6f29 SHA-256: 82041701238ee167f0b35c90b69e4a7246b4f47724044faa7d8f8d28be321209
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various websites. The document body, though heavily obfuscated, contains text related to search queries for copyrighted material, suggesting a lure to attract users to these external sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/award?keyword=percy+jackson+and+the+battle+of+the+labyrinth+audiobook+free PDF link annotation
    • https://sukizasatesez.weebly.com/uploads/1/3/4/6/134686833/a5b1d06db3e3f.pdfIn PDF document text
    • https://cdn.sqhk.co/wejuladuke/ticvXjg/wikebugarifulod.pdfIn PDF document text
    • https://cdn.sqhk.co/jonuwezipagi/eMncojg/36409083534.pdfIn PDF document text
    • https://dupukaradox.weebly.com/uploads/1/3/6/0/136015529/desidoz_nebuw.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/what_is_a_trial_lawyer_salary.pdfIn PDF document text
    • https://fonuwinozizanam.weebly.com/uploads/1/3/1/4/131408397/353e368c5668.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sabobenuwe/xekuvakomopilunizogu.pdfIn PDF document text
    • http://xozadopuwol.rf.gd/what_is_the_difference_between_oracle_12c_and_19c.pdfIn PDF document text
    • http://jasesazolaf.myartsonline.com/hearts_of_iron_3_mods_steam.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/anamnesis_fonoaudiologica_para_nios.pdfIn PDF document text
    • http://valogaberel.rf.gd/holt_mcdougal_literature_book_answers.pdfIn PDF document text
    • http://lutepebenunara.rf.gd/95522909207.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/altova_xmlspy_2016_professional_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/bojiramojovos.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/gel_electrophoresis_lab_report_conclusion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9B 5372 bytes
SHA-256: 102906da6f6b43263b0bd05011f26cc8ec022ff3d0a591054166ee1b8cb32db9
font_01_sfnt_off0000edde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDE 10876 bytes
SHA-256: b66bbcc8166ec78b1e372815116a3ccda89876346597a36e9156f8dce41d612b
font_02_sfnt_off0001123d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.