Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd417a8b5ba8133a…

MALICIOUS

PDF

83.1 KB Created: 2021-03-23 21:15:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 441c86aa64b568ad8037b40bab84efd8 SHA-1: 539ffd39c2abf1876d1028318fbe2f85b5d415c1 SHA-256: cd417a8b5ba8133abd908c32e31da4f5e1637f5e696056abddc9ba23fd384a75
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://nipisod.ru/strik?utm_term=cos+180+is+equal+to PDF link annotation
    • https://cdn.sqhk.co/katutilit/vGihkFI/cara_membuat_background_gradient_di_android_studio.pdfIn PDF document text
    • http://love-your-lips.online/what_is_the_requirements_for_philhealth_maternity_benefitst5lc9.pdfIn PDF document text
    • http://ritegifufefut.scienceontheweb.net/zerazekezize.pdfIn PDF document text
    • http://pollsexpert.com/jesus_calling_daily_devotional_2021yt09h.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/math_shapes_worksheets_2nd_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/hb0lrnn/appraisal_report_writing.pdfIn PDF document text
    • https://cdn.sqhk.co/kurazagizub/jijhejq/14665887836.pdfIn PDF document text
    • http://gromstroy.com/critical_thinking_skills_examples_in_nursingd3n9b.pdfIn PDF document text
    • http://nesobaka3.xyz/1056326361322qfo.pdfIn PDF document text
    • http://zebozewazogaso.scienceontheweb.net/spanisch_bungen_anfnger.pdfIn PDF document text
    • http://film123watch.com/which_process_of_sedimentary_rock_formation_occurs_last_brainlyrdbjf.pdfIn PDF document text
    • http://presente-top.store/dijonivuxixa288w4.pdfIn PDF document text
    • http://pixxel.life/live_pakistani_tv_channels_on_youtubel3ykz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_033f8ed8949f4664b8957211f4b22aa7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d5aaf7c-354b-4239-9bce-64f72ed9fbb7/3661207815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85daf80-0091-4deb-8cb8-096a9cf8ae71/yo_amo_los_zapatos_venta_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3201efb0-13d6-483b-9324-97ac12cad60f/how_to_answer_ethical_questions_medical_school_interview.pdfIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_378517004a564561adf424e3eadfaac4.pdf?index=trueIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_fbf30dfe7de54486a127efbd5707957a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/82eb709d-ed76-4d24-a147-1e5a4ab4aa4b/what_is_the_cheapest_dirt_bike_you_can_buy.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_off000107d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D5 5004 bytes
SHA-256: 1eb23caf225d1d368770376e35441dd0d1c5b88c43784f5abb3ddacaa5c4c377
font_01_sfnt_off000118f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F1 11288 bytes
SHA-256: 247a64ea3811a4e214ab0e7ee0a2e766c64597bd56fb08ecebf993be7a3a972f

Open this report in the interactive analyzer, or submit your own file for analysis.