Malicious PDF — malware analysis report

Static analysis result for SHA-256 9758bac62a6c467e…

MALICIOUS

PDF

43.9 KB Created: 2020-08-15 03:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 018e0e697498c0fb32c0e86df1984145 SHA-1: 4747733c5e479749f77078940126130b9729304d SHA-256: 9758bac62a6c467e0025a74540b518bf7396d8d5edbed30cfb099ff854ac5ed2
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a primary malicious redirector URL, indicating an attempt to direct users to harmful content. The embedded document body text, though heavily obfuscated, contains the malicious URL and other PDF links, suggesting a lure for users to click through to potentially malicious sites. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.ru/pify?keyword=diarrhea+guideline+%25E0%25B9%2584%25E0%25B8%2597%25E0%25B8%25A2 In PDF document text
    • http://files.modelrailways.tv/uploads/1/3/2/8/132815220/wurotusodawujigoxuk.pdfIn PDF document text
    • http://files.team-tubes.com/uploads/1/3/2/6/132681880/ccdcf.pdfIn PDF document text
    • http://files.afged12.org/uploads/1/3/0/9/130969742/2886143.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/sao_khng_c_c_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/tipos_de_calibres_de_armas_de_fuego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gerakofidasetivivirodipel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/sutogomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/457826561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/punjab_gazetted_holidays_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1882/0511/files/baixar_livro_as_catacumbas_de_roma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3663/8360/files/pokemon_emerald_guidebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/vijofexojad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/70957885829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1814/9285/files/mibepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81397135942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/71533758053.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EBE 4908 bytes
SHA-256: 99588dfc287e753952494f249374f57a93784cf0784dd5c64eb036381cd73083
font_01_sfnt_off00005f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F62 6228 bytes
SHA-256: 08ce0554153cac69faba3c2f887cfcd0c27b24fdc8b4ba4516b971ae9aa68d8c
font_02_sfnt_off00006f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F88 6172 bytes
SHA-256: ee3285731637e3ec4cf4d3377ae7406a9ecbb593e905398ce72c0c4d9f8c2bc6
font_03_sfnt_off00007f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8A 9560 bytes
SHA-256: 07d21e4a23b25edeaef05d9922ccf016dc1ad220a10212082a147a7437a907eb

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