Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bcb93a4c0ac36f4…

MALICIOUS

PDF

77.9 KB Created: 2021-03-18 14:07:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 944767bd63bd26ad3814347762048407 SHA-1: 76d3e4bcba4214be1db0684cbd7a4ccf29422517 SHA-256: 5bcb93a4c0ac36f42e5d021d008d0f690e02de15d40be0630dd329ac56fc71a1
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://jumiwimov.ru/wix?keyword=maplestory+corsair+guide PDF link annotation
    • http://xufuzema.sportsontheweb.net/fofemupudexineja.pdfIn PDF document text
    • http://wadipogi.medianewsonline.com/ronanodutumekuz.pdfIn PDF document text
    • http://erogancolumbia.site/tekenogejomagaxoto3cwp6.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/cheat_code_of_gta_vice_city_download.pdfIn PDF document text
    • http://begemotiks.fun/buxobexidasinupipixitwnznd.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/tobuxafosijidageforu.pdfIn PDF document text
    • http://realwockyc.info/filsafat_pendidikan_idealisme_dan_realismec38dm.pdfIn PDF document text
    • http://shop50off.info/inventory_database_template_access_20137jvx8.pdfIn PDF document text
    • http://dekopubetalukaz.22web.org/functional_skills_level_2_maths_book.pdfIn PDF document text
    • http://dekoriribazovax.mywebcommunity.org/8385518721.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/british_council_reading_book.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/jobivomuwaloniwowofibo.pdfIn PDF document text
    • http://sreda.city/gnostic_book_of_changesdu16p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_ad6dad6d438c4d6597c8a7440a7dfd3a.pdf?index=trueIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_718f5494c36a48a0805dca8e4ceb2192.pdf?index=trueIn PDF document text
    • http://sezusol.epizy.com/aldebaran_bard_quest_ragnarok_mobile_answer.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/41489844122.pdfIn PDF document text
    • http://nodafawujanego.rf.gd/date_format_php_am_pm.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/75063817319.pdfIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_fe3ada8fd88b4d18a7b0bbf61592ff59.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4297b7b-5185-4208-ac55-71c7bb943172/95657241906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b757bb46-256a-4bcb-9b9e-b428198ad60e/melev.pdfIn PDF document text
    • http://sajatuvireguta.atwebpages.com/tixogerezajowige.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_off0000f012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF012 5348 bytes
SHA-256: a05d159f0e3d62ad9e3e8bd52e6712edade0074dd67178cc0d967a86955b0e1d
font_01_sfnt_off00010261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 11124 bytes
SHA-256: 28af2ecc985e225932e5b3e0449e994f522bdb9d39452eb8db6554999c4524e7

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