Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b50cf1cc4ed8840…

MALICIOUS

PDF

79.2 KB Created: 2021-03-14 08:20:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df538ba52406a22a5dae2095c1ec9bf3 SHA-1: 137446da550135b3c485f70e891a5245ac37b946 SHA-256: 3b50cf1cc4ed88407e2d454b3002b70407ff1fdbb374342237dec1e76267db2c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a website offering a download for 'wifi reaver pro apk'. This, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or malware distribution attempt. The PDF structure itself is also flagged for duplicate object bodies, indicating potential obfuscation or malformation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=wifi+reaver+pro+apk
    • https://cdn-cms.f-static.net/uploads/4499635/normal_602166a232c53.pdf
    • https://static.s123-cdn-static.com/uploads/4464735/normal_5ff035b520ca1.pdf
    • https://cdn-cms.f-static.net/uploads/4428033/normal_6037fac164e14.pdf
    • https://cdn-cms.f-static.net/uploads/4480382/normal_602e31c70f0f9.pdf
    • https://static.s123-cdn-static.com/uploads/4465149/normal_6002a8284f475.pdf
    • http://jusojixanona.getenjoyment.net/how_to_use_a_plot_diagram.pdf
    • https://cdn-cms.f-static.net/uploads/4423431/normal_5fe86baf364cf.pdf
    • http://pumaguli.scienceontheweb.net/rogozubupebarudagoz.pdf
    • http://jakusavu.sportsontheweb.net/mercedes_eqc_preisliste.pdf
    • http://kozidozilujivox.getenjoyment.net/basutisigafofob.pdf
    • https://static.s123-cdn-static.com/uploads/4368466/normal_5fee3788dce03.pdf
    • https://cdn-cms.f-static.net/uploads/4391620/normal_603923703d729.pdf
    • https://static.s123-cdn-static.com/uploads/4387566/normal_5ff28658f0785.pdf
    • https://static.s123-cdn-static.com/uploads/4419206/normal_5feb4f72da1d2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1c1d65fb-b402-467d-be72-893278ee919f/jubalovabamudijifuzolaxom.pdf
    • https://uploads.strikinglycdn.com/files/f8024171-5bdd-4f27-b116-9c448fabba5a/wowijivu.pdf
    • https://uploads.strikinglycdn.com/files/e2159f90-055f-4aa0-a3e1-27c1cee17f14/nifewiwalesedulafoto.pdf
    • https://uploads.strikinglycdn.com/files/932d9712-b19e-4b22-ab39-d57355937c4b/40252236367.pdf
    • https://uploads.strikinglycdn.com/files/d6cadbce-41c0-4b1d-bf64-380c8bbe4ed8/foponokok.pdf
    • https://uploads.strikinglycdn.com/files/c367eac0-ef79-4572-9835-fedb8cefa9cd/lotofidotuwilozefam.pdf
    • https://uploads.strikinglycdn.com/files/518719bf-5087-467f-84a1-fc2054f6b07a/diono_radian_rxt_weight_limit.pdf
    • https://uploads.strikinglycdn.com/files/f4a493fc-5760-4c4c-a141-b441e6340537/can_too_much_sex_cause_low_blood_pressure.pdf
    • http://tuwutexo.onlinewebshop.net/diferentes_tipos_de_aparatos_y_sistemas_del_cuerpo_humano.pdf
    • https://uploads.strikinglycdn.com/files/709803d7-1462-4366-af8e-2d0e885cb138/descargar_traductor_espaol_portugues_gratis.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7cb.bin
cf044110370d84d45988ebaa202d6d365b65e5165499a67e268ad7aabc99ab65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CB 4824 bytes
font_01_sfnt_off0001085d.bin
2a1244a83e1ef55a1df148d5b0be132522121f9e78750b6d0cdb38071f4c150e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1085D 11028 bytes

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