Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1cd148b94eb421…

MALICIOUS

PDF

82.9 KB Created: 2021-03-17 08:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 74f58585b862c0f25a1de01ca1f1b7e9 SHA-1: 9187aa5bc9db022d63b1be4cc45166a52da665d6 SHA-256: 1c1cd148b94eb4210b573c3f0c6612492fb93e7318b37c27adfad9a4cffeeb23
126 Risk Score

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 0.9990

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://crophysi.ru/award?keyword=agile+business+analyst+resume+pdf PDF link annotation
    • http://webpost.pro/20518439654itp5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484107/normal_6026dfc817058.pdfIn PDF document text
    • http://promooffer.site/how_to_use_autocad_basicsbmdkz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443344/normal_5fec79bfc38ad.pdfIn PDF document text
    • http://xeeewq.xyz/67231230489d95wz.pdfIn PDF document text
    • http://indonesia2health.online/53369714923vsmr5.pdfIn PDF document text
    • http://idealica-co.site/xitexesesojufubisituzne.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403263/normal_5fdbd25dacd00.pdfIn PDF document text
    • http://storeeuro.info/vogibovepawukuz9ygiu.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/tax_agent_authority_formndbjc.pdfIn PDF document text
    • http://marketes.pro/sevegil9svoc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413117/normal_60177ede36969.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/best_rated_guided_tours_of_italyk7y91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420910/normal_5fdaf1e06d5d3.pdfIn PDF document text
    • http://rameautbxy.space/white_noise_for_sleeping_rain48vcd.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/additional_mathematics_form_4_notes.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://uploads.strikinglycdn.com/files/791557ed-5c14-4084-995b-d45c0deb489b/biden.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/how_to_learn_coding_online_quora.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/ravonuvunawakorilasi.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/balu_mahi_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/english_to_urdu_offline_dictionary_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c4e3430-7f79-4317-b52b-8a32857e13e9/55120491189.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/nepejabesefuvadugokiwedez.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/90177775431.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F6 5364 bytes
SHA-256: 356e82b93029c8ff622e74e52699bde9ba1b68d1507459a95dbcf88d41ebb841
font_01_sfnt_off00010a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A14 11096 bytes
SHA-256: aa8073171b9dd5274ff4cfe348bfad40691270ec798ff05df1662a1ea1bdba7c
font_02_sfnt_off00012fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333