Malicious PDF — malware analysis report

Static analysis result for SHA-256 e943ae44af243e47…

MALICIOUS

PDF

76.3 KB Created: 2021-03-16 10:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 446b38ba15ed1a8962e670e33f1f4c95 SHA-1: 98f01d73d12be0271621a8c76c0670454c2f52ec SHA-256: e943ae44af243e471d8f335dac4b81e828e5fd0743cc0d7f6e31bb519a5ca828
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 0.9993

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://ponafet.ru/wix?keyword=thomas+dale+high+school+chester+va+football PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381294/normal_60067089e743a.pdfIn PDF document text
    • http://tikovg.xyz/54761936174eqfas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_604d1a9716cbf.pdfIn PDF document text
    • http://totalcreditcheck.info/multiplication_and_division_fact_family_triangles_worksheetsl0a1l.pdfIn PDF document text
    • http://file-id.ru/amona_tete_mabo_free3kod0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_601f617bd6d72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417422/normal_601c69cf004b3.pdfIn PDF document text
    • http://daimontimur.org/duzisujeksow4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412767/normal_5fdf0ef72926e.pdfIn PDF document text
    • http://masajsalonunuz.com/google_analytics_event_tracking_form_submit9kmq6.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/58f23d49-87e3-4d9f-a4c2-a2f4e9c3ef26/cursos_de_ingles_en_linea_con_certificado.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/does_leo_die_in_the_blood_of_olympus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d9262b-0ccb-43ea-a620-c65f0cc0efbb/why_is_my_linksys_router_blinking_green.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/253b207e-02de-477f-ae45-0240f54568f9/fatigue_icd_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde8c566-ea25-44e3-a117-06374474456a/springfield_wireless_thermometer_with_indoor_outdoor_temperature_and_humidity.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/gobufobafupokapubakara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b36e90c-7c10-4cd3-9498-e2df9e4e6a9c/81587388347.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/77527187297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0a69ea-6510-4286-a473-0877482831cd/how_to_find_original_photo_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7288fe-c048-4e7b-89b7-1a9d3303fdfe/jediwufonijuwipigenupi.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/bluetooth_app_sender_apk_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/lifawiroxomolifukonokes.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/gevagolo.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_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 5584 bytes
SHA-256: 641658825044e0e20a52e75ac320ef9349d515964c33149cb804f25358f7ec13
font_01_sfnt_off0000ff66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF66 10576 bytes
SHA-256: 621478ff3cb5fdb02f47113c167c09a8d903d7882f2a5ac844ee89744fd0e3e3

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