Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d59144cc79a817…

MALICIOUS

PDF

80.4 KB Created: 2021-03-20 05:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d03b21b2aa5d19fd0f2113f1c592a1d9 SHA-1: c0d40d17c72131058ed881ead6b3ac6f2516c424 SHA-256: f0d59144cc79a81746277097cecf8dc7cfbea329fca4daf05fdd57b7ca46a765
126 Risk Score

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 0.9997

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 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://crophysi.ru/123?utm_term=antarctic+ice+sheet+growing+2015 PDF link annotation
    • http://lumufurisazela.mywebcommunity.org/99880686774.pdfIn PDF document text
    • http://teachost.com/similar_polygons_geometry_worksheet_answersv375l.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/posebe-tepimudaf-jofebiwodu-moparuvaletep.pdfIn PDF document text
    • http://xemopubuga.iblogger.org/google_sheets_no_sign_in.pdfIn PDF document text
    • http://gayerkan.com/2019_ford_mustang_gt_premium_convertible_reviewjiv6d.pdfIn PDF document text
    • http://astropsychology.site/50522342157jf96d.pdfIn PDF document text
    • http://votixowet.22web.org/weather_report_in_west_bengal.pdfIn PDF document text
    • http://tublitalia.fun/bollinger_band_trading_rules6qilz.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/e2c4064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bifajone.rf.gd/conduit_bending_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/bootstrap_form_input_class.pdfIn PDF document text
    • http://zijegoragakodis.epizy.com/16980056370.pdfIn PDF document text
    • http://bibalaluroxute.epizy.com/bhaagamathie_tamil_movie_video.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/wajiziw.pdfIn PDF document text
    • http://zadosuwiwebuw.epizy.com/the_lion_king_full_movie_2019_free_download_tamilrockers.pdfIn PDF document text
    • http://bonipoja.epizy.com/do_marine_officers_take_the_asvab.pdfIn PDF document text
    • http://jilevatawew.epizy.com/airbrush_apk_pro.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/lisikufiwaj.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/cbse_bye_laws.pdfIn PDF document text
    • http://wegugoleta.onlinewebshop.net/what_causes_your_dashboard_lights_to_flicker.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/34213081961.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_off0000fbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB2 5560 bytes
SHA-256: a5a7b0c6e6b33b40902c3f5a0e8fd627ca5db17d0442d6a6465cdc61449f7d6f
font_01_sfnt_off00010eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB2 11020 bytes
SHA-256: 2390c94c33965483e970774b68cd656c7a621c94827044fc9293e380aca2cb99