Malicious PDF — malware analysis report

Static analysis result for SHA-256 5756012660f802ff…

MALICIOUS

PDF

85.6 KB Created: 2021-06-04 07:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1e035bb9806bd17a59f5e1ef1adb0f34 SHA-1: 056241824edc27f287f14d73ad3fb02f5911602b SHA-256: 5756012660f802ff9afbd6dd20cfbf41ba980d0cfc5b75fbcbe7bb4f2ef147ca
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary suspicious URL being https://ponafet.ru/123?utm_term=asean+outlook+2019+pdf. The document body is heavily obfuscated, but the presence of external URIs and the overall heuristic firings suggest it is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/123?utm_term=asean+outlook+2019+pdf PDF link annotation
    • https://kafazuvowimi.weebly.com/uploads/1/3/4/7/134705673/vamafexawujat-relujawimolala.pdfIn PDF document text
    • https://tebixuku.weebly.com/uploads/1/3/4/5/134595315/xevawinawewoz_zimijotadup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_60b8a52464a99.pdfIn PDF document text
    • https://wuzubetimu.weebly.com/uploads/1/3/4/2/134266391/9b05223a0.pdfIn PDF document text
    • https://sutisivanopazar.weebly.com/uploads/1/3/4/3/134310164/gobag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_60431defb514d.pdfIn PDF document text
    • https://winalefumigis.weebly.com/uploads/1/3/1/4/131437210/romoduderumizados.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zepadatoju.pbworks.com/f/how_do_i_get_my_10_free_psn_card.pdfIn PDF document text
    • http://gipomebepate.pbworks.com/w/file/fetch/144582642/pamepokoteguvezamowogivis.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/f/ielts_writing_task_2_topics_2021_with_answers.pdfIn PDF document text
    • http://gapufipi.pbworks.com/w/file/fetch/144543627/fobixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b563c25b-d7c8-4932-85e4-67a0a47f9986/que_dia_es_feriado_en_octubre_2019.pdfIn PDF document text
    • http://sisagexal.pbworks.com/f/wujananazenibajadod.pdfIn PDF document text
    • http://daridameku.pbworks.com/w/file/fetch/144595107/26929005608.pdfIn PDF document text
    • http://pafunanukexe.pbworks.com/f/what_are_the_i_iv_and_v_chords_in_g_major_scale.pdfIn PDF document text
    • http://kafunujazuwo.pbworks.com/w/file/fetch/144578199/how_to_change_chat_font_on_roblox.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/w/file/fetch/144450480/mobile_hacking_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a9a01ba-2078-4bce-90dd-88c265828734/5848842495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a37ffd4-add2-447f-b0eb-dc6e5108fe0e/pepaniraxevuguwilas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad20fa0-3f89-40c2-8e37-40576e7e642b/best_photoshop_tutorials_youtube_reddit.pdfIn PDF document text
    • http://gupiguna.pbworks.com/f/80518997570.pdfIn PDF document text
    • http://finebov.pbworks.com/f/bopuvetisabutetilavoj.pdfIn PDF document text
    • http://detomipipu.pbworks.com/f/proto_germanic_language.pdfIn PDF document text
    • http://xigivesupi.pbworks.com/w/file/fetch/144591285/18429290057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4592f9f2-4ff0-4962-ace0-6c60e64d9f7a/the_emperors_handbook_goodreads.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012b33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12B33 18800 bytes
SHA-256: 7533c1313623db734ee84a4bd080a2a00f3937f6f739d4d791ea67ff75738a99
font_00_sfnt_off0000f0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CF 5472 bytes
SHA-256: 7f77dbd270de12c7a15870ebaf93d931318152e738cb21591ebea89a9e6478d1
font_01_sfnt_off00010383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10383 11580 bytes
SHA-256: 60a659143e8502b3d83c1c8e06929837a387de180db560dcfb148391974db7be

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