Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ee876ded61112e…

MALICIOUS

PDF

73.5 KB Created: 2021-03-30 14:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e4e94cd01448b04b64acaecc0740b5fd SHA-1: 90fb53a8b41fd17a2634afe5b74f18dad767652b SHA-256: c0ee876ded61112ec9bad39b3ff8fbad0539ad905992b991e3fa9ffbccdf3ef3
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 0.9999

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://leonvi.ru/award?keyword=cadena+de+valor+pdf PDF link annotation
    • http://kokulotasuz.mygamesonline.org/how_to_change_electric_stove_drip_pans.pdfIn PDF document text
    • http://setuxewofuzek.iblogger.org/64669588147.pdfIn PDF document text
    • http://mixadutibunuzu.22web.org/14793784110.pdfIn PDF document text
    • http://zunololanuxigu.sportsontheweb.net/tukage.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/39cad1b7-1d9f-49aa-b4a6-5f2637b771eb/icd_10_code_for_malaise_and_fatigue_nec.pdfIn PDF document text
    • http://besipopi.epizy.com/colours_tv_live_show_app.pdfIn PDF document text
    • http://konazosite.epizy.com/at_quando_vai_o_imposto_de_renda_2019.pdfIn PDF document text
    • http://kugilib.rf.gd/15220851288.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/ambarsariya_full_movie_worldfree4u.pdfIn PDF document text
    • http://musajaso.epizy.com/24560089650.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/code_interview_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/549fccd5-4723-4c06-977a-445adfbf3528/bitofexolaz.pdfIn PDF document text
    • http://tunojaw.rf.gd/citizen_nighthawk_bj7010-59e_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b161cc5-1aa8-41bc-92ef-0c7c498c9130/calculo_diferencial_e_integral_concepto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a39fea-e49b-4551-b977-2e9b232dff3c/how_do_you_fix_a_craftsman_lawn_mower_that_wont_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/092f8788-dcb9-4ae3-867b-a9b447cea200/vawebusoxijawagewowejida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd7b4aff-5adb-4131-b154-dd33350d9856/how_to_get_apple_music_for_free_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/how_to_port_vi_to_jio_online.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_off0000e0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CF 4824 bytes
SHA-256: 6fb07c2c2c10560c3d94e6a5945bc94ee60973490ceef32b1bb69352422ddc45
font_01_sfnt_off0000f14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14C 11760 bytes
SHA-256: e9d8913031903845fe3f48039779315af60a9cb9f62ebee35d44231de64bdb83

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