Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7acdc9947c324bc…

MALICIOUS

PDF

79.3 KB Created: 2021-03-20 05:15:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cf933afc655ae3afa3b93bb8ace2d1b0 SHA-1: 056834259fda4e04ceee94a279163ba1b54a36e5 SHA-256: e7acdc9947c324bc11701c92038d602dfc70163c7f170a18102ec6f0dd47161c
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The primary URL, https://botokaw.ru/123?utm_term=stellar+lumens+coinbase+quiz+answers, indicates a potential cryptocurrency scam or phishing attempt related to Coinbase quizzes. No scripts were extracted, but the PDF structure and numerous external links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://botokaw.ru/123?utm_term=stellar+lumens+coinbase+quiz+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460476/normal_600cb633b11e4.pdfIn PDF document text
    • https://cdn.sqhk.co/ketalidukepi/hgePghn/dungeon_defenders_igg_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450506/normal_5fc77314bef7c.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/iegicha/great_farmhouse_plans.pdfIn PDF document text
    • https://ragurinibobuma.weebly.com/uploads/1/3/3/9/133986244/5dba4fa5b8fd1e0.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/6509610.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463526/normal_5fe11ebfb23f7.pdfIn PDF document text
    • https://cdn.sqhk.co/vojazodelud/ggjiILf/wheels_on_bus_song.pdfIn PDF document text
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/5888599.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/ggViiif/gallery_63_owner_net_worth.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424951/normal_5fec4c3319478.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_ed5d87ba1e4141348de0f1c44e89b948.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/348c5f89-fd27-40ca-963d-c76d46e4a8d3/honda_marine_dealers_brisbane.pdfIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_dab79727d9a94a1ba6981729540fc23f.pdf?index=trueIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_0db9622af76340b78adcb878fb5dfd95.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf2b1c3-a568-471b-a76e-e3d80d6b0fc9/tenotatubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e81d137-b94c-46dc-a0b0-ecf88210f6a2/84336715050.pdfIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_b1ef1f8fcfaf4cb29a75d6640beac81f.pdf?index=trueIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_e1e6ed31a0544c228c9e1fb0ebda8949.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b0bbe6-e03c-4baf-9bb8-cd6ab75c5209/what_is_meant_by_human_development_what_are_its_different_approaches.pdfIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_34b8f5aa5dc84134866d10ebba2042bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c75247bf-410f-4f66-88a5-e4805b34212a/42146640702.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_off0000f542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF542 5456 bytes
SHA-256: 42347e5d384b30fc7139a2cf8d1862d3298e10b7be25a36de01c039fbbfd65b5
font_01_sfnt_off000107d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D8 11756 bytes
SHA-256: 5af17e0b1040840a1fbe4b87dd683a571c70652ab38aa02485834214e9665efc

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