Malicious PDF — malware analysis report

Static analysis result for SHA-256 516196b64179b37c…

MALICIOUS

PDF

77.4 KB Created: 2021-03-12 17:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4190690dc8ae4262925453e6af524e81 SHA-1: c2942c65d05ef86dd54ba7c009582a2fb5f0f3ed SHA-256: 516196b64179b37ca633f17cdf01b351e66ae5e35a9b063a76207f44575cc933
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/wix?keyword=gang+hand+signs+chicago PDF link annotation
    • http://worldhold.online/cuantos_milimetros_son_1_pulgada_y_media8b2e8.pdfIn PDF document text
    • http://pufopiguzelefe.22web.org/lefos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403119/normal_5ff4d9bb98d61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_6043670687015.pdfIn PDF document text
    • http://de-bewertung-889562.icu/what_is_the_importance_of_energy_conservation_in_this_time_of_typhoon_and_pandemice2egg.pdfIn PDF document text
    • http://jazazopito.22web.org/83125325286.pdfIn PDF document text
    • http://qrastenmap.online/archimedes_information_in_englishxi5jy.pdfIn PDF document text
    • http://kolagiriwu.22web.org/honolulu_police_department_report_forms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424637/normal_5fcc9ee74d642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5fea3e9ee0aac.pdfIn PDF document text
    • http://zabavnyi-slon.ru/japanese_grammar_exercises_with_answersr0t52.pdfIn PDF document text
    • http://creampiepow.club/rapupul26k4n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_bc1b9c8dde1f4fc78cfd1f6975140fce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f82b124d-ab1c-4022-b42a-02fb2761776d/fugifonawitibagofalefoxar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93fb4373-fee0-493b-9e38-212c5e21f745/nirole.pdfIn PDF document text
    • http://nadefivetokilak.rf.gd/goverumizelumatakajar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0267ee3-186e-4cdd-99c7-894952c62dd3/which_of_the_following_operators_can_be_used_with_pointers.pdfIn PDF document text
    • http://folijurojavagig.epizy.com/12933494107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40cb13ca-7bac-4fef-857f-aef0aa0f881d/the_adventures_of_huckleberry_finn_chapter_19_quotes.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_df67b347509449b5a1cb568bb41e5406.pdf?index=trueIn PDF document text
    • https://dd3a609d-fcd9-461e-ae06-f7e9ec6f332d.filesusr.com/ugd/811c3f_342dd6885179490698749135685a3d28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e485b04-a498-4c57-a91f-0a094e8b6c8e/bowazekigisimanom.pdfIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_93576d6b449847b1864bd1a202f32e35.pdf?index=trueIn 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_off0000f3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 5104 bytes
SHA-256: 88fc9438c777256414b914a96eb42aad8102dad4b4c6e734306febf03b4f7119
font_01_sfnt_off00010532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 10124 bytes
SHA-256: 0100a23232faec2fadfeff13c8f878c6f82a1873855bf7bc9db96abb9be2a8a9

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