Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd507aee5e04554…

MALICIOUS

PDF

73.3 KB Created: 2020-12-13 13:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4b8e7515a5dd00d2e4fa52883b93bb4a SHA-1: 126e4c7038da297543af55942b8e0919123f0b5a SHA-256: 4bd507aee5e04554ae9784940ff47d52434b238de3fecd047cef5e6c35252e00
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/aws?utm_term=love+ringtones++telugu+naa PDF link annotation
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/dozupuxetomafukoxow.pdfIn PDF document text
    • https://zokagagewawo.weebly.com/uploads/1/3/4/3/134346606/patoxapalomoten.pdfIn PDF document text
    • https://xilemizafijoso.weebly.com/uploads/1/3/4/4/134483217/lisuditox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f8a92edec126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f8860547d7fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://static1.squarespace.com/static/5fc144361c8c7413143450ce/t/5fc3702961e25426e1a40841/1606643754360/how_to_get_research_commission_ticket_plus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e727ea4a794d5645064f/t/5fc185f6eaf37e3b64d61e21/1606518262822/air_compressor_maintenance_log_sheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7ae458b9e860b7b227cd3/t/5fcaf6e09d29b56e4df923f7/1607136993157/kodi_lee_songs_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcecfc5efaa704a0f58b666/t/5fd6013b313c42342b827b33/1607860540558/sandstorm_action_for_photoshop_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1961b24ece27e9141d4c/1606228321972/percy_the_small_engine_gallery.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12ec9f7cf8c75402cc175/t/5fca896f5846d15d25f948c7/1607108977724/nfl_network_stream_xfinity.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/lunar_phases_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6beaecb936d6a06a4c2a9/t/5fcf7b4757846c5b8358154c/1607433032485/daily_lesson_schedule_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc007c924b06a7eb3fa3bc3/t/5fc19a322dd96f59182b9a23/1606523443177/go_math_grade_3_answer_key_chapter_12.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/wugatunijapefi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf18cbc819f1cf49d9a32/1606283660738/mens_tanning_suits.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC176 4856 bytes
SHA-256: bbd32a602cad92c11bcaacac08fc644f57af128c3a7d8f49252cc1d4cdc65054
font_01_sfnt_off0000d214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD214 3428 bytes
SHA-256: 931823ab03f5b91413640c2bc06e3687c8d4351e215e7823763b38eb8c5fdc97
font_02_sfnt_off0000df9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9F 10116 bytes
SHA-256: d1e907df04c24df5f01abd4ffe158fa90b03ec705d45831fcd277b67c55cf02c
font_03_sfnt_off00010257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10257 16164 bytes
SHA-256: e428de66ceb9deebdb53ebe71febfe16dde38f113f03500bd416f391f33c23f3

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