Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be02caafe70dc35…

MALICIOUS

PDF

79.5 KB Created: 2021-04-29 18:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d6614911b6a2f382c19205e2938519f8 SHA-1: df68d47401ac284f83fb74b9c1ccae608a22e8fd SHA-256: 8be02caafe70dc35d1297a7be506043de4cede7e67a27ad3184086fc0e499e5f
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 0.9998

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=spider+man+comic+background PDF link annotation
    • http://wenatal.getenjoyment.net/76612624055.pdfIn PDF document text
    • http://pelubexeto.getenjoyment.net/current_account_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/zubafena/4j8iegg/geometria_descriptiva_arquitectura.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/nidikegibobufenoka.pdfIn PDF document text
    • https://cdn.sqhk.co/rebosuvut/gKkec2d/ballet_litecoin_block_card.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/gf4iifJ/3425596810.pdfIn PDF document text
    • http://kutivefivugokev.mypressonline.com/fuzeditodekavo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ae9cd3fc-a2ed-4114-aa96-dd53a7e96ab4.filesusr.com/ugd/22cbe6_094b10b733624a358690a877a68592b0.pdf?index=trueIn PDF document text
    • http://jimakobogugiwa.epizy.com/tukiwaxukepodul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f23890cd-53e1-4b99-8f69-b907dd6a2474/jujapuxifateza.pdfIn PDF document text
    • http://bagomurugidapig.epizy.com/34092899680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1dd02ba-c0af-4365-8595-c805f6525c00/9001_iso_2015_quality_manual_word_template.pdfIn PDF document text
    • http://sumawimibodi.rf.gd/mexinewanajovevijas.pdfIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_efb5b747093f4319a994d4bc54a3d5e1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/55f727f5-f7aa-4f0e-8c8a-1779ccc9ccc8/dutawaxaz.pdfIn PDF document text
    • http://sinusisokopex.atwebpages.com/behold_the_lamb_martin_willett.pdfIn PDF document text
    • https://52c77544-2eb8-427c-ad0e-a8a7e2ea9366.filesusr.com/ugd/93288f_69f223bd2d29416f83fd16c3aec901d1.pdf?index=trueIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_9882064750374f66950c36db9ff2a814.pdf?index=trueIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_eaec1a74e6224cad81dfee45ee1c6903.pdf?index=trueIn 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_off0000fa54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA54 5488 bytes
SHA-256: fc12922d3afaddd43e9ed32637c877939136f73dfc7edb5ebf10cb2ac4821108
font_01_sfnt_off00010ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE6 10424 bytes
SHA-256: bf968c104d70344e9c1cd85953577343c7956a7236bcee89ae225c6450c42df7

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