Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff066b8f12c9dcd…

MALICIOUS

PDF

82.5 KB Created: 2021-03-22 10:27:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9987ec33ea2db4350e159ecbfa2c2a5e SHA-1: a8da2ba0c2c984834bbdda647b69dda6b7c52a59 SHA-256: 9ff066b8f12c9dcdd7fe4dba6436a6f67c0fd692857392e3f170a796d51b6ada
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. The primary malicious URL identified is https://nipisod.ru/award?keyword=positive+affirmations+for+life+pdf, which is likely used to redirect the user to a phishing or scam site. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/award?keyword=positive+affirmations+for+life+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470683/normal_5fc9c06f11ade.pdfIn PDF document text
    • http://bivoliku.mywebcommunity.org/test_poziomujcy_angielski_b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_604a946fd871c.pdfIn PDF document text
    • http://labupazagi.iblogger.org/muzoxafoduxidovamozu.pdfIn PDF document text
    • https://cdn.sqhk.co/dowivita/gdjbhd5/senupexonojelinuzepebi.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/aDaibvz/zetebo.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/lenexipupaxoxaloxowiser.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/T1gcgfH/576443031.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/99583705039.pdfIn PDF document text
    • http://tezatigobupuvu.22web.org/3d_blueprints_for_minecraft_pro_apk.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/26681593-e108-4b91-9384-55a8da8760da/ruthless_by_william_de_mille_summary.pdfIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_76a59e29ee414b61bc063511cd7ee2d0.pdf?index=trueIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_bd4983943b14430298cbc2f5d666b069.pdf?index=trueIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_42c76b4d8f9543849368bec67a601861.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/afa10a6f-e033-4806-8eba-c8dbf4f6bd05/what_is_meant_by_knowledge_economy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd43e7b-fbf4-4df0-a0c5-12c2a11138b1/front_porch_screen_door_ideas.pdfIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/management_case_study_with_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94aacda8-7a15-4166-a256-781693375023/71698331133.pdfIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_6d45d8b750f54df6b50c7960f174b6f7.pdf?index=trueIn PDF document text
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_964eb531d625493e954bd1f292a8108e.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_off000103f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F6 5248 bytes
SHA-256: 0ff0d9df2d293a8283abd751c227187c312f005521bef1e77a8a9ce9a6a2a7c3
font_01_sfnt_off000115c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C6 12668 bytes
SHA-256: 2e3e9eaaf34773eb8cd8bc475b8754c1b8d141c81507021215fe3db57fc42bad

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