Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0ef62362eca246…

MALICIOUS

PDF

66.8 KB Created: 2021-03-08 05:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 23ffc92a89b38bc95518b55e7d01bb8e SHA-1: 22f17213179df31c919585a92c314e3f93980c60 SHA-256: 3e0ef62362eca2464febeaee5d46ce35529e9c058ac0a66ac1e706558d94b853
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 0.9997

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://dugedepap.ru/wix?keyword=lu+wang+mathematics PDF link annotation
    • https://diminulagiv.weebly.com/uploads/1/3/4/4/134489960/34f5d49f62.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/limelesexoxaro-rirojokatob.pdfIn PDF document text
    • https://gomafaned.weebly.com/uploads/1/3/5/2/135296522/sokonotelim.pdfIn PDF document text
    • http://zitukuwekoba.sportsontheweb.net/porter_cable_c2002_regulator_repair_kit.pdfIn PDF document text
    • http://lesagotefawa.22web.org/grade_10_math-_algebra_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_6043f26b74a28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450048/normal_602cd949ce97d.pdfIn PDF document text
    • http://levantemosaic.com/how_do_you_program_a_chamberlain_clicker_remote2y04f.pdfIn PDF document text
    • http://rankingcoach-apps.com/cyberpunk_2020_wiki_johnny_silverhandfdahh.pdfIn PDF document text
    • http://rm-swis-mine.com/19349374723bpiim.pdfIn PDF document text
    • http://sazulido.medianewsonline.com/why_is_my_video_player_screen_green.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452157/normal_5fda51353b70f.pdfIn PDF document text
    • https://womazineput.weebly.com/uploads/1/3/4/8/134895737/4978177.pdfIn PDF document text
    • http://vedice.ru/linux_os_interview_questions_and_answers35qep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/kitchenaid_stand_mixer_cover_diy.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/zoom_h1n_vs_tascam_dr-07x.pdfIn PDF document text
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_3ead0650573c44b3ad0c35de5035d9b8.pdf?index=trueIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_12530d22941745c2b8a9c7d65fbd8cea.pdf?index=trueIn PDF document text
    • http://zaduzos.myartsonline.com/sokosukiboxadarug.pdfIn PDF document text
    • http://kazixovo.rf.gd/asbestos_removal_guidelines_nsw.pdfIn PDF document text
    • http://bewojux.epizy.com/fubij.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_off0000c8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B0 5116 bytes
SHA-256: 408069772bf5bfba65d16bb9aa1fd35a50c3cec4536c4a2aab8ad5083b2cf4b8
font_01_sfnt_off0000da13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA13 10512 bytes
SHA-256: 6ce4048e6e9a6ca1b86498d61aefd9c509fabeb891b4f5a33c69d3b872dc3976

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