Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a5c521392ba2c3…

MALICIOUS

PDF

80.5 KB Created: 2021-04-02 05:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1515659ca589ed810e27134a06103a45 SHA-1: 480fdc1dfa01fe561d0b7b463cab45e6413cb90d SHA-256: f6a5c521392ba2c35ca684a1168c771cffdb1b233e6f349a4efe76353c04dfe9
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, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' in one of the URLs further supports the idea of tracking user interactions for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=the+forgotten+way PDF link annotation
    • https://cdn.sqhk.co/fijajiles/cWxhhgi/virtual_girlfriend_simulator.pdfIn PDF document text
    • http://runojiwum.getenjoyment.net/62282162374.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/eJSgiyS/weather_houston_forecast_radar_severe_alerts.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/toro_timecutter_ss5000_drive_belt_routingxguoi.pdfIn PDF document text
    • https://narosixepitifon.weebly.com/uploads/1/3/5/9/135960882/c51e727a3c2.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/tarsal_bones_anatomy.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/garmin_gtn_750_installation_manual.pdfIn PDF document text
    • https://fedifugakebijir.weebly.com/uploads/1/3/2/6/132695471/9532058.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/hbsqcPg/76087506538.pdfIn PDF document text
    • http://leyloften.online/chemistry_structure_and_properties_1st_edition_solutions_manualvk0hp.pdfIn PDF document text
    • http://kismyketio.com/beatbox_instrumental_mp3_downloadsrfz9.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/I0k3hgR/movie_catalog_software_free.pdfIn PDF document text
    • http://arendagg.xyz/pometoriwijurowqvit.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/ernest_hemingway_cat_in_the_rain_trke.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://uploads.strikinglycdn.com/files/6ff0ef45-bcb9-46aa-b261-0fa476cca9ca/someone_like_you_piano_music_sheet.pdfIn PDF document text
    • http://nomamazuzut.atwebpages.com/beauty_and_the_beast_easy_piano_sheet_music_free.pdfIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_eafbca837fcd4d818dd72d07bda3d4a7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/209a73c4-0827-4b1c-ae9d-fc082197807a/vifep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79e3d469-8399-4483-ac7e-953719757a64/33225970787.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_13ba50c36f4248aa833ed54c0aa0b494.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5650b903-310b-4019-9a6f-575b10f16966/lixasamuxakibemuvulopase.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_off0000efbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBC 4704 bytes
SHA-256: f861fc7a7087958c83b4bd746155760f38fd37af21e93cb0d9afbf147530640b
font_01_sfnt_off0000ffc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC3 11728 bytes
SHA-256: 1d73772c7561df88a802e91a188d2863ee0fdd4c6a0b6907e6d68ec7de7d6fae
font_02_sfnt_off00012720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12720 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.