Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2d162d4e8c0cff…

MALICIOUS

PDF

80.3 KB Created: 2021-03-10 19:06:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 575b812117d32203114747a6f231d9e1 SHA-1: 11b5909d112aeda94aaf9d39913f2f64ed1492c3 SHA-256: 1f2d162d4e8c0cffdf09fcc8f7e488cc385b04d52bf084523d85a24ffebfdf60
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 0.9997

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://botokaw.ru/wix?keyword=resumen+del+principito+corto+pdf PDF link annotation
    • http://xedijama.getenjoyment.net/partitura_de_hey_jude_para_piano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500189/normal_603917975d220.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485580/normal_5ff1480ee9a70.pdfIn PDF document text
    • http://duwosolutanuz.mypressonline.com/fishman_aura_spectrum_di_and_acoustic_guitar_preamp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499282/normal_601fb72c69ad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_601d801d2b947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460255/normal_5fd7d129c3c68.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/pizafukudojatefewuzova.pdfIn PDF document text
    • http://kerosijuvibeg.scienceontheweb.net/99926854394.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406456/normal_5fef9a1092cdb.pdfIn PDF document text
    • http://varigiz.iblogger.org/raizes_do_brasil_resumo_homem_cordial.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/haier_split_air_conditioner_filter_cleaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446507/normal_5fcc6145905f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c4647614-9ff8-4b00-b819-08dc938bd166.filesusr.com/ugd/5d3f24_9a96804aa3734c64b60a6aa026c8529b.pdf?index=trueIn PDF document text
    • https://4c982f7a-b72b-446d-8c7a-5e2d6818c0db.filesusr.com/ugd/519a61_4c1a95ea1cbf401b91c0b2af41e53d3b.pdf?index=trueIn PDF document text
    • https://cc652f91-b1ab-470c-b36f-46d838ef85b2.filesusr.com/ugd/fbccce_14b33d4747a94d0e9cd774fc35cdcb14.pdf?index=trueIn PDF document text
    • http://xiwozoget.atwebpages.com/76516176920.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/download_novel_trial_of_apollo_4_bahasa_indonesia.pdfIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_d10673b913e24e0090fd4f3aaa3f2baa.pdf?index=trueIn PDF document text
    • http://magonusu.epizy.com/68807972165.pdfIn PDF document text
    • http://nukamepewavux.epizy.com/jobavoripugumufafukuna.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_off0000fd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 5100 bytes
SHA-256: 5fe2215e4882a18fd180c3ab9b4088a7f1a5af1e3cc6b885e9e50d04f8ab0591
font_01_sfnt_off00010eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB7 11624 bytes
SHA-256: 56c15067fa8ca90c449a15bbd21d67e1f45383744f02d1ea89c48d8f7eaa0c2f

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