Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb444eeddbb5666c…

MALICIOUS

PDF

78.1 KB Created: 2021-03-08 20:11:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1207217bd8ec179a822d248d35c4ca21 SHA-1: e3c9b2777208e3ee6ac055446a7409f409388630 SHA-256: eb444eeddbb5666c1684ef83d5616082acfeeee8af682ce8d220b2ad70eda4a1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

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://crophysi.ru/123?utm_term=poster+design+with+powerpoint+template PDF link annotation
    • http://nasamipow.22web.org/airtel_app_new_version.pdfIn PDF document text
    • http://forexgeeks.net/84688451571fqep3.pdfIn PDF document text
    • http://mejarada.iblogger.org/carry_on_wayward_son_supernatural_remix.pdfIn PDF document text
    • http://mainsale.info/pretty_little_liars_book_10_read_onlinedkg8j.pdfIn PDF document text
    • http://wgathering.org/dragon_ball_z_android_18_power_levelnwbmq.pdfIn PDF document text
    • http://probmake12.xyz/smart_tv_deals_cyber_monday_2020t006q.pdfIn PDF document text
    • http://sq11mini.com/gepamiwilin8b6wg.pdfIn PDF document text
    • http://buybritishcat.com/how_to_forex_trade_for_freecfs6z.pdfIn PDF document text
    • http://businesslinecenter.com/lepuvefd513t.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/11397863127io8ao.pdfIn PDF document text
    • http://cleaner360.shop/537918858696fea2.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/d54c946a-1e61-4e1e-b4ad-9dddd4bef6d3/60297042955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31392fa6-2ebb-4e52-9d6b-fcc743e37709/before_we_were_yours_novel_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9984ee51-2c1b-48c3-b790-0c2573b58c0c/fundamentals_of_database_systems_seventh_edition._ramez_elmasri_and_shamkant_b._navathe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/564db9ce-8124-4d28-8ba9-0f8028e7d226/67807139408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e9450a9-c376-49ea-9a2f-d3ce6c201159/83608990030.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/jimawagepa.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/vodanarexepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140b2dc1-1ef0-4563-bc66-3e60319a1777/55978860689.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/50857458297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1afc99c8-691d-4039-8353-d14d54819185/simplifying_equations_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/mevirutewuwupekuzalew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a2d5c6f-0a77-4e06-8826-aa16f80a2ecc/replacement_for_western_digital_media_player.pdfIn PDF document text
    • http://dipulitexaxuz.epizy.com/academic_performance_of_filipino_students_in_mathematics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d9b9ad-52af-40e8-80bb-29bb227b1e4b/rfu_dc_out_para_que_sirve.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_off0000f3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F3 5468 bytes
SHA-256: 2525467e311cedb1dedbcd7ca4f28fcfc5d43460dff553fc7b923db7fdafef83
font_01_sfnt_off0001066e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066E 10616 bytes
SHA-256: 1c7a1f35d2cd687f27adafc9b9cc9c9c6610dc8c5599c72506c79e699f4150a0

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