Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03d5e8b3ff375ca…

MALICIOUS

PDF

93.6 KB Created: 2021-03-17 23:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e015a95f181068ca5f7b397445aa7f89 SHA-1: 04f6e9e4ae14810e6b4d0a97a1301e4218120e4b SHA-256: e03d5e8b3ff375ca95bb714c093f33c3d712d9825921e304f12fd61d1ba8cf68
156 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that appears to be part of a link farm designed to attract users searching for specific keywords like 'online movie stream apk'. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a phishing or malicious content distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=online+movie+stream+apk PDF link annotation
    • https://cdn.sqhk.co/jawuraxexije/hbC4Zie/kidudesewejikoxufile.pdfIn PDF document text
    • https://cdn.sqhk.co/gegatuzikat/javgeY3/62589528661.pdfIn PDF document text
    • https://cdn.sqhk.co/fejipotegevi/Ejh0idY/best_free_business_ppt_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/pigalixow/apUljj1/medieval_warfare_weapons.pdfIn PDF document text
    • https://cdn.sqhk.co/fewukise/hHibgid/aesthetic_fonts_copy_and_paste_symbols.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_f94906796fcb473ea44b4f8507d7717d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gedexim/pre_admission_form_for_nursing_home.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/what_are_the_different_types_of_array.pdfIn PDF document text
    • https://6c892e0d-5736-4b4a-96a3-cd490fd1fe3d.filesusr.com/ugd/1407cd_3e8e3311d41b421e94e26d1154c17c9b.pdf?index=trueIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_6e669b43bed14ee7934d1a0a5ef37cb1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/733413281.pdfIn PDF document text
    • https://67536400-2f23-40e2-9d3a-36ae3f4dfb8c.filesusr.com/ugd/5312ea_ad762eb6641e45359810b2838d34875d.pdf?index=trueIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_48f2b8bbf844444cb43ef637e9ce3cfa.pdf?index=trueIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_a6b5c9e4e3f3488bbe9bf31324b89f66.pdf?index=trueIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_3dc137f140c24764a964c2d46be7bd29.pdf?index=trueIn PDF document text
    • https://6776ac3f-883f-499f-bc52-38dff818ec46.filesusr.com/ugd/969751_79ff5cae25e946198ffa736ae35a56e8.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_7182f834161843b0a35787f4e898960e.pdf?index=trueIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_a6fa6bb9074143f488f77ae9d88d69f7.pdf?index=trueIn PDF document text
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_5968775a68f84e22b3464b72f5c2d45e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejobu/mikajewisulali.pdfIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_3cd3508fb4064cee850ce04722b19221.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jusuberu/compose_decompose_numbers_worksheet_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/bounded_rationality_meaning.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_3ecd83c3461e40a1aa677a166153a3d7.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F76 5116 bytes
SHA-256: 56680c472865e870de34cd9051e8ce21aa96f9d5512d13274ce200700bf88b35
font_01_sfnt_off000140c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C8 11504 bytes
SHA-256: 023e5c0e1c3b37a3322a2acca0d193a4bc21dd5e287c6e36c75392155ea656a0