Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e631f7df1c7dba…

MALICIOUS

PDF

73.4 KB Created: 2021-06-03 22:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 38d6b727a3a2a2967aa4b576012a8048 SHA-1: 308b2785f6209f2c58bf577c3afe339e9fe55a0a SHA-256: b0e631f7df1c7dba8e1b6741ed640a51a124315298a34676b9f317bd47737b1d
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'garglob.ru' which is associated with a lure for downloading a game. The PDF structure and embedded content suggest an attempt to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://garglob.ru/pbw?utm_term=descargar+pokemon+platino+nds+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383699/normal_6029b593686fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_603df543bb106.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427509/normal_5febd42d33a57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470828/normal_60b7adbab5c23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497685/normal_5fd61eecc98ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijomirurefi.pbworks.com/f/zifaxuwopavuton.pdfIn PDF document text
    • http://pinurakus.pbworks.com/w/file/fetch/144550323/bombastic_words_and_their_meaning.pdfIn PDF document text
    • http://wepoline.pbworks.com/w/file/fetch/144450375/6065114991.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/f/pakubuxazofewidegakis.pdfIn PDF document text
    • http://kuzimotum.pbworks.com/w/file/fetch/144531861/dujerobaw.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144451602/how_to_reset_code_on_hotel_safe.pdfIn PDF document text
    • http://gibabug.pbworks.com/w/file/fetch/144575877/gobunor.pdfIn PDF document text
    • http://molitutolu.pbworks.com/w/file/fetch/144555546/pre_employment_medical_check_up_singapore_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c45082fd-5de6-4fb2-a50c-ef18dc6050e5/42033866137.pdfIn PDF document text
    • http://jiboduxoguv.pbworks.com/f/57706625847.pdfIn PDF document text
    • http://fagimox.pbworks.com/w/file/fetch/144519597/how_to_set_defiant_door_lock.pdfIn PDF document text
    • http://zekodunu.pbworks.com/w/file/fetch/144442902/gorov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2cd2779-80d7-4da3-8358-45dcc4502b8a/tulavopupunafaropanamuz.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/f/are_oakley_batwolf_z87_approved.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144421179/82912538995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/354487c5-cf9c-4e50-8afa-57e1c4a77998/test_de_raven_escala_general_para_imprimir.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/w/file/fetch/144440019/zotejuropofidolozese.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/f/what_is_the_theme_of_the_story_oedipus_the_king.pdfIn PDF document text
    • http://goxeguj.pbworks.com/f/bohr_model_drawing_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ac4d79-2022-4bf9-83dd-e2af6462c620/67904818521.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/w/file/fetch/144418575/can_you_spawn_a_jet_ski_in_gta_5.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_off0000dfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE8 5456 bytes
SHA-256: c48e02155e6785f02f7b9f82fe7ef8cd9ee12d3c9910950cb99b15ce914b8e6d
font_01_sfnt_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 11076 bytes
SHA-256: 048ced22f6d4324865b12ca73628bec18f0d3962db731c67d672ee1ef8e19450