Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7a3573f8c08552…

MALICIOUS

PDF

72.4 KB Created: 2021-02-12 12:00:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: bfcd15d75c90925d9f8fde6cc691eb36 SHA-1: f0e5a5c93d84e5c39d98493a8fd59cc2a2119e57 SHA-256: 3d7a3573f8c08552580c3239686a217f75937713e89db3986a4bf2d709bb5b74
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the 'link farm' heuristic strongly indicate a phishing or malware distribution attempt.

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://baarspo.ru/wix?keyword=yo+go+verbs+list PDF link annotation
    • http://vseti.life/466078872ovq41.pdfIn PDF document text
    • http://gogotmif.space/mexolujagugadekisopoxog4y3q3.pdfIn PDF document text
    • https://nibadaxolakawub.weebly.com/uploads/1/3/4/8/134882114/882567.pdfIn PDF document text
    • http://pixelbarista.com/bikojibowanexetizepavovssoz.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/testout_pc_pro_test_answerskwz64.pdfIn PDF document text
    • http://bupetud.xyz/zello_ptt_walkie_talkie_free_download31n0z.pdfIn PDF document text
    • http://salestore.pro/chirodini_tumi_je_amar_instrumental_freeb8xms.pdfIn PDF document text
    • http://wide-take.top/bezetofovzev8z.pdfIn PDF document text
    • http://webpost.pro/designing_with_the_mind_in_mind3pw16.pdfIn PDF document text
    • http://igrarazuma.info/duck_hunting_kayak_with_dogwt2wv.pdfIn PDF document text
    • https://jalusuduzewot.weebly.com/uploads/1/3/1/4/131456012/5660681ff16e.pdfIn PDF document text
    • http://larts.digital/j_mcmurry_Organik_Kimya_8_ed_brooksghhdo.pdfIn PDF document text
    • http://busivel.xyz/13204851729tuqto.pdfIn PDF document text
    • https://gewukojinita.weebly.com/uploads/1/3/2/7/132712116/bikobegugiliwego.pdfIn PDF document text
    • https://salotoniv.weebly.com/uploads/1/3/5/3/135305201/3693493.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tetexabe.epizy.com/zebagobekipowusireturoje.pdfIn PDF document text
    • http://dopatujijidami.epizy.com/57158906695.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_off0000e02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02D 4804 bytes
SHA-256: 5c4d2aebb9eadf55271fb3005c4aaba505c93313e4ac3e1989b93957220255a5
font_01_sfnt_off0000f0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A5 10532 bytes
SHA-256: 914bd4713e9ef051f7fe8adb0a8d376ac3ccb50f70ee0976f4772f657c2a11ad

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