Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4997dba648b8b4…

MALICIOUS

PDF

75.0 KB Created: 2021-03-08 13:14:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 98adfc93a9c3b99d29304e48de992edf SHA-1: d55dfb5aba670fbd159bb8140a4e92928c50830c SHA-256: 2e4997dba648b8b4025a8b63eb2577ca09951661a75b1f82f574dbf25efc4d21
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'leonvi.ru'. The document body, though partially corrupted, suggests a lure related to business costs, likely to entice users to click the malicious link. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest malicious intent.

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://leonvi.ru/strik?utm_term=what+is+the+difference+between+cost+of+sales+and+revenue PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378619/normal_60185130c1409.pdfIn PDF document text
    • https://cdn.sqhk.co/kapipota/Mhhjagh/47432789763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484820/normal_602b9800e304f.pdfIn PDF document text
    • http://wozuxel.getenjoyment.net/international_bar_association_conference_london.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/T9lepih/pulse_pressure_definition_nursing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497372/normal_5fdd5b35d62f6.pdfIn PDF document text
    • http://wusozupu.mypressonline.com/17835947830.pdfIn PDF document text
    • http://lynciguest.com/25855922220gzc20.pdfIn PDF document text
    • http://afracheat1.xyz/platform_shoes_nz_cheapnh9jk.pdfIn PDF document text
    • http://armada.technology/consider_the_frame_shown_in_figure_1_._suppose_that_f1__17_knjqcy7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426696/normal_602c0b69118da.pdfIn PDF document text
    • http://timecodes.net/texas_dmv_vehicle_inspection_reportr2ajh.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/baxSria/28376547743.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf960e2-78e6-4b5a-8870-ac637c03a5ec/divabejowosut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d52ae62c-b41f-4fda-8508-abed63731878/hidden_blade_blueprints_dual_action.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/538a14de-8321-4664-a114-a8050c7a1bc0/92402879102.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 5

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_off0000e7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E7 5412 bytes
SHA-256: 8450353af2bbd99235303a96b30820db8c8f59369d928aa6fa1461d23878045a
font_01_sfnt_off0000fa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 10528 bytes
SHA-256: cf07a624e816ad67b54bf78a69572732f942b93bef050b124cbadeb2e7dd4275

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