Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f591b8864a5e27e…

MALICIOUS

PDF

75.9 KB Created: 2021-03-15 15:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 89018dff7511e3037b7cfd2167107c1d SHA-1: 932bed1b17a096fad5f4e4aea6bec3a81d6face3 SHA-256: 1f591b8864a5e27e3a206c5c6dcbf5e5f51e484da163f3398031f39a86c3d02d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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.
  • 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://mezovuduw.ru/award?keyword=the+bookseller+of+kabul+free+pdf PDF link annotation
    • https://cdn.sqhk.co/gutipefu/hTRuXqo/fios_tv_one.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/environmental_biology_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451221/normal_5fdc194f50b0c.pdfIn PDF document text
    • http://zinefikitozozeg.sportsontheweb.net/sikovejositogirun.pdfIn PDF document text
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/vitamawilu_zifivirukomi_temade_nulemivalir.pdfIn PDF document text
    • https://mevemedetu.weebly.com/uploads/1/3/1/8/131871578/tedet_xixuteraxeboki.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/how_to_set_up_summer_waves_pool_pump.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuxopova/cTUHybW/70768357972.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/aa8e66b6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_602e28adbb24d.pdfIn PDF document text
    • https://cdn.sqhk.co/jebanufebejo/wfiiicM/the_hundred_years_war_and_the_plague_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/ghigh8J/t_galleria_guam_restaurants.pdfIn PDF document text
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/3c180d34aff1.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/zibixexitutatipozojif.pdfIn PDF document text
    • http://pegejoruvufiron.sportsontheweb.net/english_grammar_exercise_tenses_multiple_choice.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/aEeiaij/stick_ranger_wiki_magician.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/penefelomiju/activate_office_2013_kms.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/sasuvak.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/ambitious_baba_insurance.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/vadegajikep.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/aeroporto_malpensa_ufficio_informazioni_telefono.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1D 4932 bytes
SHA-256: e06b28e6bc8268b62b66c36ec5af4e833be3dbd0a4dd14e494f233946eb157cf
font_01_sfnt_off0000ece2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE2 12096 bytes
SHA-256: e92bc112ac37713bed2ccbf642f8cfdbf6fd35de74f633dc4900b296c969a0aa
font_02_sfnt_off00011422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11422 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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