Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1449c3d1691143…

MALICIOUS

PDF

94.0 KB Created: 2021-03-20 23:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9e99493daa9ac1ae5b83f1e111acaaed SHA-1: 14f3d511d8e3a6273b39086765f1589c7d9b1efd SHA-256: 0a1449c3d1691143f008021fcc883df112571723297516286ed692843672058c
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO manipulation tactic. The presence of a 'download' button lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=arctic+king+wppd12cr8n+manual PDF link annotation
    • http://keluzizizeroki.getenjoyment.net/functional_testing_techniques.pdfIn PDF document text
    • http://moxegelubopidi.sportsontheweb.net/8282766514.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/what_alice_forgot_plot.pdfIn PDF document text
    • http://livemavuxedu.getenjoyment.net/dd_wrt_router_login.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/how_to_connect_samsung_soundbar_to_lg_tv_via_bluetooth.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/how_to_make_cod_rigs.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/complex_numbers_problems_and_solutions.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/47182135762.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/wegugus/gubomik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225b569a-1c91-43ad-adaf-2b06cc7766cb/99221254612.pdfIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/fipojagamejama.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/feradufuzolakomeloxivuzo.pdfIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_4e9d261114a2412d8e63fd4d095a24b5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0f3899-53c4-4400-90dd-d1c3a24730dc/noruwugune.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/wulufuxuzorefu.pdfIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_455aa7fd3ff24b7188d0ddb8705b6822.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e30ea3d-ca69-4380-8a41-b0a2874963d9/realidades_2_capitulo_3a_answers_page_54.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/plan_y_programa_aprendizajes_clave_primaria_cuarto_grado.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/suxowijam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1871d526-8134-4a35-a2cf-91e17f47b7c6/hunger_games_death_cure_cast.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_off00012bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF5 5736 bytes
SHA-256: 0f6a3903af9ffdf25812a6bfba2a5c34fc966eaa3cb474381a8ba8ba67bd0102
font_01_sfnt_off00013f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F86 13004 bytes
SHA-256: 2e7ef1a44337da11e03db2a4f4d8c5a0e6695ef78101de371311694680152dd0

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