Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe5f11aac9838a9…

MALICIOUS

PDF

77.7 KB Created: 2021-03-11 20:27:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8a89a279aadbe27ebeb2124fc6e56c7c SHA-1: ea6b40576ff1fe9fb6ee22c3a1f297e93224b6df SHA-256: efe5f11aac9838a972b4ddc3af7daedeab62cbc2ee7723229c8bd87cb96fe53d
104 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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/123?utm_term=ptfe+extruded+natural+virgin+sheet PDF link annotation
    • https://cdn.sqhk.co/vefobinibe/LiaKRHV/rutajomizifiwulugimuniru.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/g8gHXO7/16784647057.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/1UEiiaU/awesome_tanks_2_level_editor_unblocked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a47dc2de-7b6a-4e16-a8d1-eecd7b6b23b4/kinototunefevu.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/eternal_sunshine_of_the_spotless_mind_script_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/cuphead_brothers_in_arms_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6c89047-2603-410f-b775-776e6df0b62a/xopamatolefopiguvav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3d7f0ec-cafd-4b42-9bb3-ae12ad65b90c/79394494759.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/how_to_factory_reset_nintendo_switch_without_parental_control_pin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8860dda8-8654-47af-9d09-9de52833664c/25_hp_evinrude_etec_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/55408194425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e3fce6-9462-487d-a9c9-e7739d8d2ff8/2010308218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd3b573-c41e-4fe0-9ce4-2c4d12339fc1/19190504063.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/51425757948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b696c7f-2b2b-4167-831f-d5b4688bd4ab/how_to_crochet_a_granny_square_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e0966c-2d23-4629-bde7-b13b94d8ccb6/bojonefuwafamotabas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d098df8-0856-4feb-ada1-232a0e4c24ef/ropudun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd75fee2-e8e5-48e8-a8a4-fd8740969615/the_happiness_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/codecanyon_clear_ui_template_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/android_authority_giveaway_results.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3fdf53d-a680-436f-81c4-9638e9505b81/nationalism_in_india_and_southwest_asia.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_off0000eef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF3 5300 bytes
SHA-256: 7180f8285e4a4cc3d08bc817229f608844b42e4604573110d506596d7e3fe988
font_01_sfnt_off000100ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FF 11404 bytes
SHA-256: b09821d7cbb3308dcbc978a36997dfe3198d5ff0a3297bd45952f8cd0f1aed96

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