Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24f2b7ffc39073c…

MALICIOUS

PDF

68.3 KB Created: 2021-03-17 19:02:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d85445466e2a956c578825f782d5c97b SHA-1: ef248c13ffaec655367b878d4bd62b2f37a27629 SHA-256: d24f2b7ffc39073cd92dbc0cfcd405711a9b6b27fec1bcb40ae8101b707155cf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm hosted on disposable infrastructure. The document body, though heavily obfuscated, appears to be a lure for an outboard motor sale, directing users to a URL that is likely part of a phishing or malware distribution campaign. The presence of numerous external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=johnson+9.9+4+stroke+outboard+for+sale PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459466/normal_5fde3d8629bd2.pdfIn PDF document text
    • http://lidlid.xyz/motorola_xpr_7550_factory_resets8ukp.pdfIn PDF document text
    • http://myluckywin.site/wulabagujebadifiwo17fw.pdfIn PDF document text
    • http://wildber.store/32817471616wzpor.pdfIn PDF document text
    • http://lizakoku.22web.org/free_telugu_bhajan_songs.pdfIn PDF document text
    • http://subumobo.22web.org/kufilojufoxuzokevemowegiw.pdfIn PDF document text
    • http://antinomi.design/afghanistan_passport_online_application_form9d4ms.pdfIn PDF document text
    • http://wiinorama.space/pidusujjw1rv.pdfIn PDF document text
    • http://astrology-personal.online/does_samsung_tv_have_4kgmzqb.pdfIn PDF document text
    • http://copyrighytsupport.com/jaxefudupodubapawavobolp84og.pdfIn PDF document text
    • http://grafoanaliz.ru/lubixujabonebunesolily2ija.pdfIn PDF document text
    • http://copyright-services-us.com/how_to_get_free_characters_in_contest_of_championsmg44o.pdfIn PDF document text
    • http://funseeds.site/plague_inc_apk_iphone23o1j.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/breadboard_circuits_bookkkles.pdfIn PDF document text
    • http://newsportstechnology.ru/82668053412m5wyl.pdfIn PDF document text
    • http://cardioactiveufficiale.site/64874556277041th.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378619/normal_6033c39c5bc42.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dusegakalo.epizy.com/causes_of_covid_19_pandemic_crisis.pdfIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_5b2e89143dff4f96aeb6fceb9653dd03.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_b23d78d9cf4a442a85446640c1e7a86d.pdf?index=trueIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_2ff1b958540f4c218a52312dacac2560.pdf?index=trueIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_b0b98efc7ba04631a671665ff7c8b219.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_off0000cda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA4 5464 bytes
SHA-256: 7470705fd5f457c7a44a69136508a2e6da85eb71c0efccc1e1418389359f8a69
font_01_sfnt_off0000e034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE034 10444 bytes
SHA-256: 9b98e3b7c2165044e40d16c2a3c95b93ffd42f863a1534f6c03371873ec2ed73

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