Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5fa8b27c6be395…

MALICIOUS

PDF

77.5 KB Created: 2021-06-10 14:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4d5e036ef8d14d6b73c745bc3a0ae77f SHA-1: e29de83e0033d292921267e63b9913bb595dd263 SHA-256: bb5fa8b27c6be395dc3607af6ba9c3de02f15739aa8f63c21935cbf66c4d42ff
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on a link that appears to be a lure for watching a movie online. This, combined with the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics, strongly suggests a phishing or malware distribution attempt. The PDF structure and URL patterns are consistent with known malicious PDF campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://drafthe.ru/pbw?utm_term=watch+timepass+2+full+movie+online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496005/normal_6002f2c14534f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_6040778f492b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366662/normal_5fd07e2b5a326.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4483851/normal_60b2e0e8f2e50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477864/normal_5fc8d2b91cdad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_5fd613ca2a83a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452835/normal_600d09b2af6a8.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
    • http://suniger.pbworks.com/w/file/fetch/144571779/101_yzbir_okey_plus_indir_pc.pdfIn PDF document text
    • http://tewabavuxate.pbworks.com/f/how_to_get_a_free_iphone_8_plus_2021.pdfIn PDF document text
    • http://juvupumanut.pbworks.com/f/zotazunerusozunogitow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/657fd3c5-de5c-4dce-93f7-7d7ac6c5e62d/jezosevesejobalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3187fd7-e0fe-4234-91c7-38491e6ad0c3/como_tomar_acido_folico_antes_o_despues_delas_comidas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bfa9ebc-3281-4ca8-b964-be795b987e55/26359772373.pdfIn PDF document text
    • http://podixarutib.pbworks.com/w/file/fetch/144451920/how_to_reset_hisense_smart_tv.pdfIn PDF document text
    • http://fubajulak.pbworks.com/f/16005095514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8bec4db-49a8-4194-b24e-750889f9bfbf/85137141981.pdfIn PDF document text
    • http://vowijeve.pbworks.com/f/bhagavad_gita_book_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eebe329-9df3-4cc9-8e76-36145507799d/what_is_order_and_sequence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c51c5418-8a10-4361-b0db-fa7a3b489430/arabic_grammar_in_bengali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49a734c-7ef8-4856-971b-1706d4eb5171/how_to_log_into_my_arris_surfboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca231897-3f3d-40d7-a0cb-00c27db134e8/84838199915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64054d53-8a97-4187-9f50-8c681e06cc32/viralegakowufaboror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccd06da5-3f56-4efa-a5e2-e66ba7b5722a/diary_of_a_wimpy_kid_12-book_box_set.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144476364/is_manual_or_machine_blood_pressure_more_accurate.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/f/ielts_5000_essential_words.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_off0000e449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE449 5244 bytes
SHA-256: ae227f1ec751e1586229f6666c033db22271a7e5b417ba8dcc67ab49171b5b06
font_01_sfnt_off0000f614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF614 10580 bytes
SHA-256: 984ddd98aa89ccbd1febb1e396a8a8c19173bd5a09d308807535d74e499575f4
font_02_sfnt_off00011a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A37 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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