Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c5475b97412777…

MALICIOUS

PDF

75.8 KB Created: 2021-04-03 00:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5f47ca5cfa15ef46705b6393318ec60a SHA-1: 0e190e59645bab10fc609757df3784f1cd08f221 SHA-256: a8c5475b97412777a3c6ab7ae9171fbaa5ce2282ef75064e55e8648fba2ccf41
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains text related to 'Financial peace university free forms', suggesting a phishing or malware lure. The embedded URL points to a suspicious domain, likely serving a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=financial+peace+university+free+forms PDF link annotation
    • https://cdn.sqhk.co/zamokaxu/jaibVDX/sports_racing_cars_for_sale_australia.pdfIn PDF document text
    • http://nikecortez.net/kunimulejikotusidofopa0ml15.pdfIn PDF document text
    • https://cdn.sqhk.co/nowagenika/AT9ja0I/nujuruvox.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/aprendizaje_cooperativo_vs_aprendizaje_colaborativo.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/ggeAghx/ninja_sword_fighting_gif.pdfIn PDF document text
    • https://gebedosoxabitox.weebly.com/uploads/1/3/5/3/135324181/tobijulutukanubof.pdfIn PDF document text
    • https://lejimawemo.weebly.com/uploads/1/3/0/7/130739028/7578506.pdfIn PDF document text
    • http://acupofjacob.com/dark_souls_2_s_scaling_faith_weapons0x687.pdfIn PDF document text
    • http://sfr-webmail.com/ibanez_sdgr_4_string_basssqsit.pdfIn PDF document text
    • http://xomutukegadoj.mypressonline.com/xofutejojoxixozovin.pdfIn PDF document text
    • http://wewofif.scienceontheweb.net/tesev.pdfIn PDF document text
    • https://taxefijiduru.weebly.com/uploads/1/3/5/3/135311915/lanubovegefuj_detugeputekiz_jikika_ladil.pdfIn PDF document text
    • http://mifirejetevina.getenjoyment.net/cake_recipes_free_download.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/dakebesuvum/ergobaby_omni_360_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/kepuxoxeteso.pdfIn PDF document text
    • https://18e7ef82-5c75-44fe-ae22-4c356c2c9ce0.filesusr.com/ugd/749e61_797c68a64e8046ca846cd1ba91e229e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/kaspersky_security_center_11_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/barron_s_sat_books.pdfIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_5834503e845e41008c9d3f5d045b0f75.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dujepav/news_report_writing_format_for_students.pdfIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_b41fb0a2f15e4b4fb348d4069f26e64d.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_off0000e8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CC 5280 bytes
SHA-256: 6b059886a4052dd62221850b022dc1a44ea01e1d3ccc7a2c93aee5f9dad63a93
font_01_sfnt_off0000fabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABC 11156 bytes
SHA-256: d11b00b154ab2323cede8fbbc778d190cd1e14ac23aa0f63d72f9dadb9899c65

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