Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef061ad61b8a1b5…

MALICIOUS

PDF

118.7 KB Created: 2021-03-31 23:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 78688374af086c1ecd74d37c9ea7c2d5 SHA-1: e844533d2ab2a3380e18772ca506f093792f9640 SHA-256: 4ef061ad61b8a1b531febc22c136ae6f54f5ca9667c7ebaf638585a91381108a
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=the+magic+flute+story+summary PDF link annotation
    • http://gemofesane.medianewsonline.com/time_series_analysis_princeton_university_press.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/fuzuzuw.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/19130046735m3fjc.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/nortel_networks_m3904_headset.pdfIn PDF document text
    • http://francobusiness.com/rabbit_population_in_australia6zp77.pdfIn PDF document text
    • http://nuveclovet.xyz/free_photoshop_training_videos8fffo.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/bankable_project.pdfIn PDF document text
    • http://jilet2.club/electronic_devices_and_circuit_theory_11th_editionq0kjq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496165/normal_6013764a190bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459325/normal_60243a0496426.pdfIn PDF document text
    • http://dvestideyli.xyz/hp_officejet_pro_8600_printhead_cleaning2o6kz.pdfIn PDF document text
    • http://karnaval.host/how_to_study_medical_laboratory_technicianbcwb3.pdfIn PDF document text
    • http://lunesygets.xyz/how_to_describe_the_organizational_culture_of_a_companyeyagy.pdfIn PDF document text
    • http://custits.space/pasotoxenajatogumevizirobrnnr.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/cylinder_surface_area_worksheet8y8wy.pdfIn PDF document text
    • http://innov-cis.net/lagu_cover_asmara_2lk1aq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490974/normal_60504cae8266f.pdfIn PDF document text
    • http://artyom.guru/how_do_i_reset_the_lc_code_on_my_samsung_dishwasher4be23.pdfIn PDF document text
    • http://gebikomuxe.getenjoyment.net/does_family_dollar_sell_dog_clothes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_b8a53689f9f444e3a0d4047f81ce3183.pdf?index=trueIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_912c384750bf4391842e47aba03d6360.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000175ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175AE 2828 bytes
SHA-256: 2f32373152b86590eb5c993bf8dbb57d20fc33770b92bc1ec6b5fd985d660553
font_01_sfnt_off00017fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FB7 5124 bytes
SHA-256: 5eddd3619b88d57d2ebf0d078d87381b97b44f390a705c60d39f76485556da40
font_02_sfnt_off00019130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19130 13332 bytes
SHA-256: c7613657d97a3bf7aef9a2aec83913e046ecb908793c09e8bb40f1fed2345fff
font_03_sfnt_off0001bced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCED 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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