Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cceee27f7fbf63d…

MALICIOUS

PDF

77.0 KB Created: 2021-03-29 21:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 79e4ca725e637b189021e78a8f2c5e20 SHA-1: 873fa0062c57f82e0a8028bda24c889a8a77d744 SHA-256: 1cceee27f7fbf63d7ff9e044c59a8c1fcf90a130d50897c5e48e78b586765a19
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://lozipotod.ru/strik?utm_term=is+hillsborough+county+schools+closed+thursday+and+friday PDF link annotation
    • https://cdn.sqhk.co/leruwexikud/2LheggC/dash_cube_mirror_world_tap_tap_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387243/normal_5fcae4dd7fff0.pdfIn PDF document text
    • http://rexuwoxaga.sportsontheweb.net/download_microsoft_office_word_2013_free_full_version_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/gitogozune/gGCkif2/tiny_dice_dungeon_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418385/normal_601aa38c4c824.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/onde_ocorre_o_ciclo_de_krebs.pdfIn PDF document text
    • http://benovezim.22web.org/46666419488.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465398/normal_5ff0f40f455da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_60492f1ae8f62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376610/normal_5fd04e72ec07d.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/KghUjg9/nonakiwewisimabakoxoro.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/fb861d91-330d-4da2-805e-dbbebfd0b1fa/869859672.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/40712653068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63cdd545-c0f7-4a87-9859-2770ae0b83e9/the_book_alan_watts_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb4da005-c736-41b8-90ea-e000637af663/mean_median_mode_range_worksheet_word_problems.pdfIn PDF document text
    • http://rawuvotatu.rf.gd/hey_you_app.pdfIn PDF document text
    • http://damufib.epizy.com/talosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82e2165-2b01-4cfe-becf-f44aca66bc72/the_mission_statement_of_your_business_should_contain_all_of_the_following_elements_except_the_weegy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b53da2-cd0c-43c5-bb59-ca5f2bae4d62/18210861539.pdfIn PDF document text
    • http://rutuvofogiseba.epizy.com/igcse_atoms_elements_and_compounds_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/078e9601-3b2d-4493-ac12-66397a6059c2/how_to_remove_an_amana_washing_machine_agitator.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_off0000eefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFD 5460 bytes
SHA-256: e02b35e5c72168d3517d1ba0be30a048ba98780c725c2a23df3db255a0e3f789
font_01_sfnt_off00010190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10190 11052 bytes
SHA-256: 76f6d9da10adceadd7a63bc5042322517db0b7e884a91640675a68dfc5740e62

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