Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3cab496f6344ed…

MALICIOUS

PDF

135.3 KB Created: 2021-03-30 03:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7446d8e9c632a8dd1416d7f7babc4823 SHA-1: 2603690567af1156b1c9ed55b86a7357e621cdd7 SHA-256: 0e3cab496f6344edb3bf5bfb28e3d2642a5d8e97e00a92141f5fc84e3e0a109f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The 'SE_SECRET_RECOVERY_LURE' heuristic strongly suggests the document's purpose is to trick users into revealing sensitive recovery secrets. Numerous external URLs are present, with many hosted on disposable domains, indicating a likely phishing or credential harvesting campaign.

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/wix?keyword=algebra+2+multiplying+polynomials+worksheet PDF link annotation
    • http://return-0.com/controllable_canonical_form_in_matlablolmc.pdfIn PDF document text
    • http://wordwild-store.com/advanced_linux_system_programminggdn03.pdfIn PDF document text
    • http://organize.shop/adjetivos_posesivos_pospuestos_ejerciciosao4l4.pdfIn PDF document text
    • http://legiontry.online/onn_pink_bluetooth_headphonesdjst2.pdfIn PDF document text
    • http://avtoshtorki.shop/xomanipijefedoxazosofunc1tfh.pdfIn PDF document text
    • http://gugibugud.mygamesonline.org/riwufegexa.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/pci_b._pharmacy_syllabus.pdfIn PDF document text
    • http://alkim.xyz/planos_de_instalaciones_sanitarias_p0baua.pdfIn PDF document text
    • http://anrostore.ru/egyptian_symbols_and_their_meanings3z72l.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/rejusodedobora_jagigazim_lasexesomedepo.pdfIn PDF document text
    • https://lezolofajikop.weebly.com/uploads/1/3/4/3/134353880/kumuvutu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://miwufojo.epizy.com/experiment_25_calorimetry_lab_report_introduction.pdfIn PDF document text
    • http://wosekamilos.epizy.com/what_does_voided_check_mean_in_finance.pdfIn PDF document text
    • http://widojedup.epizy.com/64153100336.pdfIn PDF document text
    • http://dufojamimusim.atwebpages.com/gurefovawugaget.pdfIn PDF document text
    • http://vukelas.rf.gd/light_relief_reviews.pdfIn PDF document text
    • http://fezivepe.rf.gd/rolunodegujimaki.pdfIn PDF document text
    • http://fukuselumetu.myartsonline.com/hypercalcemia_treatment.pdfIn PDF document text
    • http://nasuxenabo.epizy.com/31191394264.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_off0001d5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5A7 5752 bytes
SHA-256: 4d2d76d13b0086212f5f78bf879136cbab37bbbeb4bb8fb274681ab017b683ee
font_01_sfnt_off0001e92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E92D 11136 bytes
SHA-256: 570b9f70a7f8a446884e2cf805581a61fbdee84c3bfb01f87e88d8c95ec9e989

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