Malicious PDF — malware analysis report

Static analysis result for SHA-256 3994e0478126386d…

MALICIOUS

PDF

74.8 KB Created: 2021-05-18 02:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d9d77f751a0834c01ec8bb44c4083bc6 SHA-1: 9ac82956d1c0c67edfb684210d7003df5bbe0a1c SHA-256: 3994e0478126386d2f2c4273c00768980d6cb729217f19a3d7dfd4222b9bc115
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lozipotod.ru/strik?utm_term=ielts+academic+reading+sample+pdf+with+answers PDF link annotation
    • http://rirarojafetojep.iblogger.org/surah_mulk_full_bangla.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_6046f549294e8.pdfIn PDF document text
    • http://pozesex.iblogger.org/69852130956.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484805/normal_5feb08bc0fd1f.pdfIn PDF document text
    • https://xufetujada.weebly.com/uploads/1/3/4/7/134745175/fdcb4b.pdfIn PDF document text
    • http://dejojikeresofo.iblogger.org/how_to_calculate_number_of_years_experience_in_excel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464542/normal_6002e7c972cd4.pdfIn PDF document text
    • https://vumirexow.weebly.com/uploads/1/3/2/7/132740730/vegorugobowadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379477/normal_601f94a503725.pdfIn PDF document text
    • https://sufixekanol.weebly.com/uploads/1/3/4/7/134712322/jisagilili.pdfIn PDF document text
    • https://pidoruna.weebly.com/uploads/1/3/5/9/135966994/zuwamewoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474719/normal_60245c5b2cabf.pdfIn PDF document text
    • http://ponoxavar.iblogger.org/widudaxibotesaxigure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_60414dcc9ba49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_603bd4480baa1.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/laradusa/syllabication_worksheets_for_grade_1.pdfIn PDF document text
    • http://dajaxul.epizy.com/50460840208.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/beste_samsung_telefoon_onder_de_200_euro.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/the_highwaymen_movie_cast.pdfIn PDF document text
    • http://kodireso.epizy.com/ags_beers_criteria.pdfIn PDF document text
    • http://nesuvumuvugelo.epizy.com/57437073936.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/86564021631.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_off0000e2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C3 5600 bytes
SHA-256: 0f61ffc38a234b6a907f66f6cfe3f1ed01621f20e8239208611619b62fac96c4
font_01_sfnt_off0000f5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B5 11620 bytes
SHA-256: ecb79f6288c93852e55aac32d1105f75ed669db6d4d540d04071ae395ac9275d

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