Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a733b752289b201…

MALICIOUS

PDF

85.8 KB Created: 2021-04-05 13:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 25004ab215f5299e73ebb3f24fa04f3a SHA-1: 599ec73465a5ca78ecfa0ae39373ab8f558cb4d3 SHA-256: 2a733b752289b201580e55ebc3f5a33482ea946badd59d2676b989f6efd33029
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://leonvi.ru/strik?utm_term=diccionario+espa%25C3%25B1ol+portugues+pdf+descargar PDF link annotation
    • http://sisefotazu.22web.org/carnatic_music_basic_lessons.pdfIn PDF document text
    • http://kepovimobezozo.iblogger.org/abhiyum_naanum_movie_mp4_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_601df4cfb9a62.pdfIn PDF document text
    • http://gisibumovemuv.22web.org/modelos_de_gestion_de_calidad_total.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370090/normal_5fef85deabc6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_60454399ac8c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467005/normal_5fccd5f372029.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_e1b92aa91f91489fb54974b850465342.pdf?index=trueIn PDF document text
    • http://jerimopujokanar.epizy.com/king_size_bed_sheet_online_malaysia.pdfIn PDF document text
    • http://tividisexagit.epizy.com/99956031921.pdfIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_76767188d3014be39b528eff550596bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/76026943731.pdfIn PDF document text
    • http://nuverefuregiw.epizy.com/mewafexo.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/98400331112.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/bosefebakukasowijixo.pdfIn PDF document text
    • http://fuvibopa.epizy.com/japanese_grammar_book_for_beginners.pdfIn PDF document text
    • http://desixomagi.epizy.com/tamira.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/sigitewanenanoxokidu.pdfIn PDF document text
    • http://dogefifuga.rf.gd/5158108574.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D7 3044 bytes
SHA-256: 077c9d1f363836090044d8ec301bdccd8b8f2633f8e7cad60cdae01df5771239
font_01_sfnt_off0000f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AB 5536 bytes
SHA-256: 12e813fed8723d686a01086d8290e81997758b5fb2509e31f584969987d2031a
font_02_sfnt_off00010750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10750 13728 bytes
SHA-256: 4f97dfa3f231b465e5351d951919723474aa63544a12383612589bb69c2147fa
font_03_sfnt_off000131e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E6 16096 bytes
SHA-256: 292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87

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