Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0d0ccd822a15df…

MALICIOUS

PDF

79.5 KB Created: 2021-03-15 23:59:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c97193e654b4392a26cb8e8c05fdc597 SHA-1: fa9a1ffd84a9d9d72116a3d79e2ab1840e3051f5 SHA-256: db0d0ccd822a15dfe71ee96a5530ee6b76de586c274379bd7a654117524625e2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one pointing to 'vilenefex.ru', suggesting it's designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF acts as a link farm hosted on disposable infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/award?keyword=biomes+of+north+america+pogil+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/jidevumedure/egvbw1W/rinurifupifalajurudur.pdfIn PDF document text
    • http://meetsalon.xyz/sefazatopazoxoweranubrimxs.pdfIn PDF document text
    • http://kraftmann.su/career_portfolio_template_powerpointvhqkc.pdfIn PDF document text
    • http://bonifacy.site/kapexetokuxdcei.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxibovesiva/n9dts9V/wudodixowufe.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/hihdiyO/us_police_car_racing_2019.pdfIn PDF document text
    • http://kopirugi.iblogger.org/nuzalimidobudogewamo.pdfIn PDF document text
    • http://youla-24.cc/laramie_project_playurp8m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_d6c322457bfa4d7496d7d38e38b48776.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/bawara_mann_instrumental_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfafc07e-cf15-4ac8-ab1e-68a072027c6a/battery_for_casio_g_shock_5146.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/44571996037.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/best_picture_settings_for_samsung_led_tv_6500.pdfIn PDF document text
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_66ff95a9b7f94c4ab005cf62695ed83e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/73106628728.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/how_to_read_carrier_furnace_model_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a0eaf99-0291-4464-972a-aff009900b5a/xetixapusatiwanasimevota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6163dc2a-8135-4457-9927-a91ec2e4e734/lazigazawasuwigabufovugos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5410d6e0-921b-4b41-ba6e-5555cf5ee21d/4_pics_one_word_level_235_answer.pdfIn PDF document text
    • http://zesivigodexewig.epizy.com/aditya_birla_finance_limited_annual_report_2018.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_off0000f612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 5712 bytes
SHA-256: 4c463240df2d646b56d704e81b8fc352d2a7bf570bf29ebe43c1eb4a68a2a58c
font_01_sfnt_off00010968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10968 11208 bytes
SHA-256: 964e0883b9c39cd3dc474c1a49e4f16c11c1bc860ad824f0ecd066f2be5f8bff

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