Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d88d9f11cf1311…

MALICIOUS

PDF

76.5 KB Created: 2021-06-07 05:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0bde81cfa227ab0b8ebfb0c45737adaa SHA-1: caafbc319f1ba43189ff40482c278d8041e9473b SHA-256: 84d88d9f11cf1311062f564adfa30b34a26f985455151a8852f8aa6c7e8df1ec
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 an embedded URI pointing to 'xezojetit.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to 'Dr oz essential oils guide', indicating a social engineering pretext.

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://xezojetit.ru/123?utm_term=dr+oz+essential+oils+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465000/normal_5ffeb7ef0663d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413121/normal_5feb801a773e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470521/normal_5fe8ecb4e6194.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144478029/hp_compaq_dc5800_pci_simple_communications_controller_driver_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/464df816-ba5b-4252-9753-e44f3bbfe6e6/is_it_worth_buying_kindle_in_india.pdfIn PDF document text
    • http://zufiwuz.pbworks.com/w/file/fetch/144656643/vopane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5914f004-54ec-47a1-86cd-cee261e0bf17/how_to_use_periodic_table_in_sentence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73323e4-6fe5-4b7b-8d06-0cc35bc05d8a/jojalivemoxun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93db4361-407f-4962-a982-a4ecf4ba40ed/feruguripobevuwisajutod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/657066f8-3085-4005-9482-e82f5f8a5395/twilight_midnight_sun_movie_2020_release_date_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4eb889-ec05-444a-bb02-2d570c8bbb85/90631348330.pdfIn PDF document text
    • http://nibenaxibot.pbworks.com/w/file/fetch/144739182/nice_guidelines_iron_deficiency_in_pregnancy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aa999dd-94e4-43bd-8ca0-260baa036943/11729012836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb52edaf-0f79-4da8-bfaa-dbde44b6b480/how_to_install_tubemate_on_windows_10.pdfIn PDF document text
    • http://bokibagaror.pbworks.com/w/file/fetch/144628005/25176547363.pdfIn PDF document text
    • http://kopixikosibi.pbworks.com/f/what_does_builders_club_do_in_roblox.pdfIn PDF document text
    • http://wevapejatu.pbworks.com/f/tugidafom.pdfIn PDF document text
    • http://gijutexamuwa.pbworks.com/f/vegotum.pdfIn PDF document text
    • http://vikowezanipe.pbworks.com/f/jutaxigotipegofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e233607-1e96-45e5-a24e-9934be5528c0/toshiba_lcd_tv_dvd_combo_remote_control.pdfIn PDF document text
    • http://degenazi.pbworks.com/w/file/fetch/144469587/read_the_book_of_enoch_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78d59f9-008e-4475-b1e1-6e04b241f9f3/zuloxakugebax.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_off0000f03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 5040 bytes
SHA-256: 4fe387c49f8fea9db22b9c4805880fd839d7d771b476d059755527480f54e1e1
font_01_sfnt_off00010179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 10384 bytes
SHA-256: 7443640aeaf579832d7d27ffc2c556cac582ad1efb44aca2d0b9b869ac184300