Malicious PDF — malware analysis report

Static analysis result for SHA-256 57bec1c6c042afeb…

MALICIOUS

PDF

76.5 KB Created: 2021-03-30 20:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 339395532b83f93ebf1d2647a37a6965 SHA-1: 214bf82994b66140f16db14418b545fd25c7aae6 SHA-256: 57bec1c6c042afeb957f174938c2b55c6c585f76cb74be4588093b6062f14ed2
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains and configured as link farms, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=minn+kota+powerdrive+v2+bluetooth+trolling+motor+55-lb+54-in PDF link annotation
    • https://miletotafog.weebly.com/uploads/1/3/4/7/134758503/mopedaturobemo.pdfIn PDF document text
    • https://soliduratop.weebly.com/uploads/1/3/2/3/132303261/kujusav_zetomowosolu_sozikobekuxuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/giravopakiw/agcEgdk/booyah_meme_roblox_id.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://webuwexuzebonal.weebly.com/uploads/1/3/0/7/130775053/naxadenes.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/jKjgtBy/loneketazupowaxefifami.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/antimicrobial_resistance_global_report_on_surveillance_2020.pdfIn PDF document text
    • http://lynciguest.com/41887977465n4uzh.pdfIn PDF document text
    • https://ramujodavuratot.weebly.com/uploads/1/3/4/6/134667495/8c273f.pdfIn PDF document text
    • http://gnatural.space/alkaline_diet_chart_for_weight_losshqxm0.pdfIn PDF document text
    • https://nezododirexu.weebly.com/uploads/1/3/0/8/130813510/vesutawotuj_janasuvi.pdfIn PDF document text
    • http://marketes.pro/interior_designer_salary_in_texasu6r27.pdfIn PDF document text
    • http://sovuradema.medianewsonline.com/clustering_in_data_mining.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/does_att_1040_have_caller_idrdyc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mizeteb/come_eliminare_un_account_instagram_da_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91bf85aa-2780-4f89-91a7-ab186bccbdf8/how_to_change_oil_murray_riding_lawn_mower.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/gupefosububovoneviri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/283bf7e7-c89a-4b37-9414-e5e81c166c6d/sewevawuguzolozarogigosir.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/shoreline_protection_group.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/best_books_for_data_science_in_r.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55431bbd-ba07-4e74-8cfe-32345580e3b0/raveliju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8A 5812 bytes
SHA-256: cb101e4a0fc1feb3ad49f5e12d8ebcaf65948dc2895b3c4cff83307fe6ec6775
font_01_sfnt_off0000f04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 11288 bytes
SHA-256: 7fb5ec5b392ca5d922d279bf11f22cecc2f76046a84833d558f08b7eb8dfcc33
font_02_sfnt_off000116eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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