Malicious PDF — malware analysis report

Static analysis result for SHA-256 f482021afe76e7c1…

MALICIOUS

PDF

74.4 KB Created: 2021-03-05 00:57:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 730daac9b6e82eced48ca6de4974de71 SHA-1: 1754e1b9dd0e726c9a4512de65d4506f8143615e SHA-256: f482021afe76e7c136ba72c3ce4b1c9506fa569152dbaf57e3f7adaba05a896f
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 0.9993

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://kuzutuzo.ru/wix?keyword=can+you+return+wic+formula+to+walmart PDF link annotation
    • http://sabovibin.medianewsonline.com/kujevewar.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/top_25_machine_learning_startups_to_watch_in_2020.pdfIn PDF document text
    • http://pinopizo.sportsontheweb.net/33119015103.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/which_vacuum_is_best_for_pet_hair.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/44602894718.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/29715149875.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/walmart_prescription_safety_glasses_prices.pdfIn PDF document text
    • http://golixudib.mypressonline.com/how_to_change_battery_in_honeywell_doorbell.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabenejajoko.myartsonline.com/93772416479.pdfIn PDF document text
    • http://pujumek.myartsonline.com/bavopulavakan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911e398e-99ea-49ae-9e5f-7f0d4f942273/asus_rt-ac66u_reset_password.pdfIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_438e2eecd72048dbbf1749189f67592a.pdf?index=trueIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_bdbcae02738c4af9b00d5486fdc529f5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/84e473af-276a-4789-9a66-f93ce6e0c55b/how_to_apply_for_army_dental_corps_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/how_to_remove_dark_pimple_spots.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d06cb9b0-6dec-45f6-a8c3-a91a06b3c268/fuwozebumizufelufiwatowon.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/amazon_apk_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2abff77e-685b-4800-b26e-1cd43c66bec6/tipo_de_licencia_del_sistema_operativo_android.pdfIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_cbbac5aaedce4f07a77af01499974745.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/defujo/intro_to_biochemistry_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3085f829-0ab5-42e2-8069-a15e001f9a33/45496535015.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/que_es_un_estudio_de_mercado.pdfIn PDF document text
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_b4e05b453dfe4143a608f9b09f2a9f61.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_off0000e859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE859 4948 bytes
SHA-256: 01a87e6afb7a4173ae88f1efd49f0982834f6ed5b2c696baefd972f2a863155e
font_01_sfnt_off0000f935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF935 10228 bytes
SHA-256: e5a89a63fa20cf168f24e967ef44ec8c41c5df9d5d1b33077de550df0ede67d4

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