Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ad5795a62ace2c…

MALICIOUS

PDF

70.1 KB Created: 2021-04-18 03:10:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 018e4bfe9b17ce2ed3b523c5543223a9 SHA-1: c10a621f3a4acb9248fa07f2677c6e542dc75a51 SHA-256: a4ad5795a62ace2c0a1483ce6de30b9c4f70c9acd8f1077f0e919d4f6f213ede
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://seumenha.ru/strik?utm_term=who+is+miss+united+states+2020 PDF link annotation
    • http://bavunexebiri.iblogger.org/witikululosufidokad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485799/normal_606e34eb78134.pdfIn PDF document text
    • http://zibukebolavor.22web.org/54051960170.pdfIn PDF document text
    • http://sutovuresas.mygamesonline.org/2020_malayalam_calendar_download.pdfIn PDF document text
    • http://tajoraf.22web.org/consonant_blends_in_sentences_worksheets.pdfIn PDF document text
    • http://sufinamek.iblogger.org/monthly_work_schedule_template_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_60377e88d35a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471971/normal_5ff5021eac684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452169/normal_6067d37906034.pdfIn PDF document text
    • http://novofikupeneda.mywebcommunity.org/arabic_consonants_and_vowels.pdfIn PDF document text
    • http://pikegupima.medianewsonline.com/the_sum_to_infinity_of_a_geometric_series_is_60.pdfIn PDF document text
    • http://lamomusexosefe.66ghz.com/platform_heels_buy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://demosegepare.rf.gd/namatevebevug.pdfIn PDF document text
    • http://zetuvidofik.epizy.com/19816350333.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/printable_worksheet_on_articles_for_grade_5.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/jeluletopit.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/what_is_the_hound_of_the_baskervilles.pdfIn PDF document text
    • http://zozafiromilofin.epizy.com/34054874012.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/bacterial_transformation_heat_shock_protocol.pdfIn PDF document text
    • http://dibulazovila.rf.gd/nojidirevujivufawijufo.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/atlantic_rim_resurrection_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/19316436105.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62D 5224 bytes
SHA-256: 4f7a3084dac60dc3f4559f3c3dcfaf825d231a449a33a225614a3d27358d34aa
font_01_sfnt_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 10340 bytes
SHA-256: 1514676c8da026a0ab8f129cd9d8aab965475198bbd6ab4aa06f6b4a95ed46b3

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