Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec5a8db103e1e6d…

MALICIOUS

PDF

81.6 KB Created: 2021-03-18 03:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9acad7eca1093adee095eaf329ef084b SHA-1: 9f059efa20c4ad00e8c796a4cdf14e00f77f2df0 SHA-256: 9ec5a8db103e1e6d667c6f2f7946fc9a8ef5e945625749502b82481cc58f783a
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 0.9994

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://midufefew.ru/wix?keyword=basketball+stars+mod+apk+2020 PDF link annotation
    • https://cdn.sqhk.co/naxupowu/ejjgjgc/ligogulexenofek.pdfIn PDF document text
    • http://fibisazorowax.mypressonline.com/wekov.pdfIn PDF document text
    • http://blacklaser.ru/python_language_basics_booklugif.pdfIn PDF document text
    • https://cdn.sqhk.co/zexukobesu/Rgeihia/builder_base_level_5_builder_hall.pdfIn PDF document text
    • http://vixabaj.scienceontheweb.net/billie_s_bounce_guitar_tab.pdfIn PDF document text
    • http://loveantravel.xyz/is_mba_worth_it_after_30f8m9b.pdfIn PDF document text
    • http://tendernes.ru/download_atem_software_control_pc89oto.pdfIn PDF document text
    • http://zarabatyivat.ru/rider_university_musical_theatre_acceptance_rateg2d4q.pdfIn PDF document text
    • http://gavediteriremuv.medianewsonline.com/lamukizonixoxoduvinemitub.pdfIn PDF document text
    • https://cdn.sqhk.co/dipasupor/hcdigia/anyone_else_but_you_lyrics_ava_max.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/chicosci_album_zipuo7ts.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/ohaEEij/xekogejasi.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/54346dde-3953-4087-8471-119a3915cdb7/orange_jumping_spider_california.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/diploma_mechanical_engineering_books_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/badlapur_songs_pk_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5e3fe7-c5c9-4851-9d1c-96833793902a/22063080027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af236868-4807-4e8d-8d9b-4c8f120837f4/how_to_write_a_2_body_paragraph_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7822abef-a509-4ee6-86e0-f380036c1baf/98288381.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/49913297609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e44aa3-e799-438d-b1c4-c7543e7bf516/how_to_install_first_alert_smoke_alarm_9120b.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/bioplastics_research_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/86978461105.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/laregegokivewegusixu.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_off0000f82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82B 5632 bytes
SHA-256: 418026eace83fb0df2718053270f64d8b8022d194e99b6087644eb5574691a0f
font_01_sfnt_off00010b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B37 14112 bytes
SHA-256: 8fbaefdcc5aa3eefd907ddb1e0d0bdd826a306e0e1ae7c710ed5dc8302d5bd97

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