Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b465e1b8f7e38b2…

MALICIOUS

PDF

72.7 KB Created: 2021-05-17 09:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 88962f9dece7567a49721bca80e90206 SHA-1: 54b0a8f14cc237417a9f5e70045fcf7431b73273 SHA-256: 2b465e1b8f7e38b2229a1f4748d995587e43f4344bedc2dcab2d182ea69e9c76
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 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=phrasal+verbs+exercises+multiple+choice+pdf PDF link annotation
    • http://salonapp.xyz/plant_physiology_book_taiz_and_zeigeroozaq.pdfIn PDF document text
    • http://viruxego.mygamesonline.org/91448035457.pdfIn PDF document text
    • http://copyrightmediahelp.com/gefotedepixe9358i.pdfIn PDF document text
    • http://walifevapeju.22web.org/berry_s_model_of_acculturation.pdfIn PDF document text
    • http://firstdoctor.xyz/buranigebipivoweuk18c.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/zurijevumebuwavunepel.pdfIn PDF document text
    • http://saxosoxajivovud.medianewsonline.com/cancer_de_colon_elsevier.pdfIn PDF document text
    • http://com-copyrighit.com/html5_games_tutorialsqtgq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuxijug.rf.gd/clairance_de_la_creatinine.pdfIn PDF document text
    • http://duwuvafufupi.rf.gd/keziwedapumatelopetonaw.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/83160194545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7d7e22-781e-4b00-a678-261a26f100de/accounting_balance_sheet_definition.pdfIn PDF document text
    • http://gafamiziwadi.rf.gd/clinical_anesthesia_procedures_of_the_massachusetts_general_hospital_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/11478555309.pdfIn PDF document text
    • http://mogixos.atwebpages.com/dfinition_d_un_nombre_rationnel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63736192-c456-4d3b-ba3b-61318ff60011/wesewelezovogejafupapap.pdfIn PDF document text
    • http://zifasodokid.epizy.com/759617961.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/66638515195.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/gunirotovas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1000057a-356b-4220-920c-937025f80aed/5633013860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f54c21-3364-4681-9977-35751db28b8d/fagigofuzomonogatujikaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/408edd85-0ae3-487b-a890-0a587f71f7e7/90604459404.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/puxedamejatud.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_off0000dd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD33 5664 bytes
SHA-256: 3535c9c9122c2495e24793334abd596b7e2229b4ce39e24a372596a39ae94f19
font_01_sfnt_off0000f053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF053 10732 bytes
SHA-256: d20505c9a8c36db04ea26cfdcdf0e067a3c2a33baf2d1049a17ae2e41076138d

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