Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a4876a7ee74108…

MALICIOUS

PDF

70.6 KB Created: 2020-12-10 13:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be9e865b6bb02adf0e5786b221cc6f84 SHA-1: 5bfbf6ef0dfa7a0c7c3e228b5fd62d7b0e107f94 SHA-256: 78a4876a7ee7410836d8b3a7b0ea9b94a1d17b1360fb24ffa0751f8f6a5bfc24
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL and the PDF structure suggest an intent to exploit users through redirection, likely as part of a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • 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.
  • 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://ggtraff.ru/123?utm_term=iggy+pop+song+i+wanna+be+your+dog
    • https://xenofoko.weebly.com/uploads/1/3/4/7/134735933/zupiwasob-vabidekesileze-nagapubareza-dadimaxepo.pdf
    • https://vemetufubejukat.weebly.com/uploads/1/3/4/3/134367776/9943427.pdf
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/c53a54541fad2.pdf
    • https://dubozenerur.weebly.com/uploads/1/3/4/6/134687155/sotobogokaxeded.pdf
    • https://simavaxefawok.weebly.com/uploads/1/3/4/6/134666246/2b36c24bee.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/cbb2b1a9-6888-4535-a474-8ec1ad798b7b/vepoveredef.pdf
    • https://static1.squarespace.com/static/5fc570e5104edf1d779faec4/t/5fcd94d9a87f9f1b19f3b548/1607308505687/giveguzi.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe03553485235c868bf00d/1606288213758/juremejevogavifusili.pdf
    • https://uploads.strikinglycdn.com/files/008d10c8-e55e-48e1-afa5-a4c2cc483eee/gestime_aphp_fr_planning.pdf
    • https://uploads.strikinglycdn.com/files/9d19a55b-8ed9-4643-bb4e-125a3476f481/welajarir.pdf
    • https://uploads.strikinglycdn.com/files/4cb4cc6d-6afb-4c93-a393-07318b31e4be/krenin_alan_ve_hacmi.pdf
    • https://static1.squarespace.com/static/5fc79997fc603311fbfb4135/t/5fd16c5799fe644e8a53fad1/1607560286917/word_blitz_scoring.pdf
    • https://uploads.strikinglycdn.com/files/b4ee92c6-1cb4-4df4-84e3-04027071957b/47220319634.pdf
    • https://uploads.strikinglycdn.com/files/34ba1b2b-5216-4101-8a39-b095f3339eda/a_first_course_in_differential_equations_with_modeling_applications_11th_edition_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb95.bin
2b89dcebe5dbd661b82ac59a25c5bab9e72d9c2da156fc9990721a230640001b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB95 3016 bytes
font_01_sfnt_off0000c65a.bin
525ee03a677749b8c5d21c46b6a706df0c56e5090adb96b47181be0987cd7fac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC65A 5168 bytes
font_02_sfnt_off0000d7f8.bin
e4508e5c3df4bd0ec9a0dea26082398dbd8e56fca7df1d363346c7b2cbc17338		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F8 11028 bytes
font_03_sfnt_off0000fd47.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 4324 bytes

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