Malicious PDF — malware analysis report

Static analysis result for SHA-256 6668e4750fe2a1a5…

MALICIOUS

PDF

78.6 KB Created: 2021-04-17 20:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 57113ab53cd5fd87dae16558167c1b6e SHA-1: 1849e4fb313267969c7b2695effb6b43d6f86f3d SHA-256: 6668e4750fe2a1a5a1db7a8ab7a61ddff89f560cd825fe569f2b01b9a5b8593f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/strik?utm_term=braun+century+2+wheelchair+lift+parts+diagram PDF link annotation
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/judewototubutat_mubip_degitelegesida_sagem.pdfIn PDF document text
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/633ac46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413347/normal_606a40d842977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460473/normal_6060a6b59e1e0.pdfIn PDF document text
    • http://cpskras.website/dark_hero_party_walkthroughnjixg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468831/normal_60480868d6250.pdfIn PDF document text
    • http://hangookoil.ru/acca_march_2021_exam_dates_deadlinesz84l3.pdfIn PDF document text
    • http://fdvsefwfrw.space/ecg_sensor_datasheet4nlqs.pdfIn PDF document text
    • http://usacreditmonitoring.info/webogufewenobibamoboli4vakm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464707/normal_60571e188e850.pdfIn PDF document text
    • https://tozugijojabam.weebly.com/uploads/1/3/4/6/134640227/jijoguwijobe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sebosolusid.rf.gd/lesiones_del_nervio_facial.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/teamviewer_12_host.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/dejugafuwelajutizaf.pdfIn PDF document text
    • http://wisituvoj.epizy.com/gisovogizaxile.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/fun_trivia_questions_and_answers_for_seniors.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/felsons_principles_of_chest_roentgenology_4th_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/20157983898.pdfIn PDF document text
    • http://xivivafin.rf.gd/who_is_on_the_nfl_halftime_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/22397378331.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/38303763359.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/costos_de_calidad_ejemplos_resueltos.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_off0000f56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56F 5944 bytes
SHA-256: ffe45be61d6b020ac38c478d6167ab93de695da3269837f2bbeee2426778df8a
font_01_sfnt_off000109a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A8 10376 bytes
SHA-256: 73ea78588fbfc53e627b1eb6e1adc7833d17aee2680090aa3976270f502e934f

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