Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9d365b5732aed7…

MALICIOUS

PDF

69.6 KB Created: 2021-05-18 21:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2485a9acfce063126e6c81179c8d7124 SHA-1: b85fa4a075a752ef6f1acfc3bc7bfc23214cab2e SHA-256: bb9d365b5732aed7cc35002498d6b4ff6aee3cecf32ad49d0db219dc2ab13e6a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI pointing to 'leonvi.ru' was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of an external link indicate a likely phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=diagnostico+microbiologico+bailey+%2526+scott+pdf+descargar+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5fd89ae09c4c6.pdfIn PDF document text
    • http://zinuxuf.22web.org/aspen_guidelines_2016_pancreatitis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445129/normal_606ce2380e9dd.pdfIn PDF document text
    • http://mipesubukef.iblogger.org/the_5th_wave_2nd_wave.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369329/normal_5fe5276b64317.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470692/normal_5fdce9db64273.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepavipa.epizy.com/maus_2_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/rafapelufawa.pdfIn PDF document text
    • http://tofisazo.epizy.com/44940018074.pdfIn PDF document text
    • http://jatamez.epizy.com/26172554624.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/api_platform_default_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/rugefobunuzedemudika.pdfIn PDF document text
    • http://siwinigap.epizy.com/59594590758.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/vupigobevofuruwufelasigoj.pdfIn PDF document text
    • http://gesonumakokobal.rf.gd/pumpkin_carving_templates_witch.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/relegevuzejejuxesuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/how_to_set_profit_target_forex.pdfIn PDF document text
    • http://puzexexaniledow.epizy.com/77896461767.pdfIn PDF document text
    • http://nilizepukufiz.epizy.com/animals_name_in_tamil_and_english.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/biochemistry_exam_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/29848027089.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_off0000d2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FD 5360 bytes
SHA-256: ede784c6a346af66b2714a19f2986208c082123d3b28f5f78f6408fdaf86fb1c
font_01_sfnt_off0000e537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE537 10440 bytes
SHA-256: 80bfd75daed1b539a8fb9ac9f10fe485870a3214f2b6e73c1d62f0443e0a39a7

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