Malicious PDF — malware analysis report

Static analysis result for SHA-256 f380d493c5c81506…

MALICIOUS

PDF

88.9 KB Created: 2021-03-25 12:16:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 57510524b84ccfaaf8c4a92395018412 SHA-1: b5b0b5429ef9f1d158e83cf39680819b548275c0 SHA-256: f380d493c5c81506ba9bdf800934e760ab2aee33ff1da5d1f853e9d5707e3fa4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL leading to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. No scripts were extracted, but the PDF structure and embedded links suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/award?keyword=aptitude+questions+for+wipro+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373983/normal_604cbf92c34c9.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/vuvariserazukululu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367287/normal_5fc71d7194c77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393346/normal_5feee3e651afc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473379/normal_6038cbce6a130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473637/normal_602702b0d79b2.pdfIn PDF document text
    • http://maxobujixeweden.sportsontheweb.net/coding_learning_books.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423195/normal_6006e36731839.pdfIn PDF document text
    • http://tapavinologo.mygamesonline.org/83883269092.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/bncc_resumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459914/normal_603a66f2160c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484635/normal_6035c4b0b74e6.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/117dff9a-6078-4663-adeb-d19df151c193/vekegurapigotovupigusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/865bc9ff-5be7-463c-9277-64d01441c739/what_is_acceptance_commitment_therapy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c318b4d0-00ce-47df-b813-7a2fea02a5b4/articulos_de_la_constitucion_de_la_republica_bolivariana_de_venezuela_sobre_los_derechos_humanos.pdfIn PDF document text
    • http://tekaxipi.epizy.com/university_of_cambridge_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d217b3b-44bf-413c-9d6c-f16772a8673e/rozixomarifig.pdfIn PDF document text
    • http://pakolot.epizy.com/watch_me_before_you_online_free_english_subtitles.pdfIn PDF document text
    • http://wewenak.rf.gd/bhavesh_joshi_superhero_full_movie_khatrimaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2a0219-0a2b-443a-9d26-8032542118fa/grade_2_english_worksheets_south_africa.pdfIn PDF document text
    • http://retuvolixunes.epizy.com/xuvevagonulusoborevepum.pdfIn PDF document text
    • http://dexifuv.epizy.com/49929756110.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_off00011b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B70 5000 bytes
SHA-256: 923dd882f8bd090fbeb7e56e3ade5d95ed1389d14cff5dcf23d6307f9743567b
font_01_sfnt_off00012c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C97 12416 bytes
SHA-256: f49dde5bb794351b613f17cc57095f424644cf89e8f5aa4ce59dbb6ab27ac2f5

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