Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac015b1166496d8…

MALICIOUS

PDF

80.7 KB Created: 2021-03-07 06:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c2a772f8679aa30323bf1a22691e5784 SHA-1: ad17da1e3e28dc8ff973209f90c1cfbf3342afc0 SHA-256: 7ac015b1166496d8e5cd00e3972b79baca80be8b7337e3345831edf1b416998c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, suggesting an attempt to redirect users to malicious or scam websites. The presence of external URIs and the ML classification strongly indicate a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=best+home+sewing+machine+for+free-motion+quilting PDF link annotation
    • http://1xbet-registr.site/fanovagamefuforokorufevixpjwil.pdfIn PDF document text
    • http://urro-hu.com/cuantos_tipos_de_sistemas_operativos_existen1x7ct.pdfIn PDF document text
    • http://teachost.com/fagor_pressure_cooker_manualgv4qx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_60355339487e3.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/hbpgguN/wubudavumujawarojal.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/kphfhei/superhero_costume_creator.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/49278526126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_5fd3c846c7f5e.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/megisojeguliberasevonrdio.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/dungeons_and_dragons_download.pdfIn PDF document text
    • http://gelupulofevabek.medianewsonline.com/how_do_colors_relate_to_emotions.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/78601893649rkzse.pdfIn PDF document text
    • https://cdn.sqhk.co/desiketomasu/fASyjho/matuxipiwanebewipixejafab.pdfIn PDF document text
    • http://mibejar.sportsontheweb.net/how_to_connect_astro_a50_for_firmware_update.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484804/normal_601a2270b7e6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_603223dda9e66.pdfIn PDF document text
    • http://nunokulivot.22web.org/propresenter_5_windows_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/mary_poppins_umbrella_handle_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9c1305-8054-437a-b07b-f0d9d22499c5/flotec_sump_pump_home_depot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ca4483-5c80-475c-bece-2627fd4c8193/yamaha_motif_xs6_keyboard_price.pdfIn PDF document text
    • http://wajiletum.epizy.com/circuit_simulator_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b30f9d-1ca2-430b-a76c-60c8a27c5c0c/do_taxes_pay_for_obamacare.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_off0000fcba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBA 5596 bytes
SHA-256: 1a1a259e14da13c8087675d267d56ec78a7f9145f068a1c34aa69b542b818f95
font_01_sfnt_off00010fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB5 10448 bytes
SHA-256: f8070ffcb9ee1d41f068c65193bf291e73c57c99302adb144311c361f737a129

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