Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e6ef9a271928df…

MALICIOUS

PDF

80.5 KB Created: 2021-03-11 20:32:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37fd5a5c8b61becec5acdef3d0acaaa5 SHA-1: d37403f7fbbd09ed530caabd03e48bc0220a2c32 SHA-256: a1e6ef9a271928dfe86a88d7bff0ed0239732a992efd3efffe12f722773d6f8c
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL 'https://zajinet.ru/wix?keyword=7kpp+character+guide' suggests a lure to a potentially malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=7kpp+character+guide
    • http://lowabunuzoxa.getenjoyment.net/jupataf.pdf
    • http://gejejasofubi.mywebcommunity.org/que_la_fotografia_aerea.pdf
    • https://bivunuse.weebly.com/uploads/1/3/5/3/135392281/f528242ec.pdf
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/0d67261d.pdf
    • http://instasurprise.online/locum_pharmacist_invoice_template_australiag4ntu.pdf
    • http://vpntop.info/republican_party_platform6mq48.pdf
    • http://warewakeb.sportsontheweb.net/diferencia_entre_la_comunicacion_de_animales_y_humanos.pdf
    • http://confirmyourverifiedbadge.com/37077182124zbu45.pdf
    • http://womenita.fun/fabowoviknmljb.pdf
    • http://avlto.best/wildgame_innovations_mirage_18_trail_cameradhk2e.pdf
    • https://rasisepuwefu.weebly.com/uploads/1/3/4/6/134678142/7815fe.pdf
    • http://rivilidopu.medianewsonline.com/nevasikuwor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/moduluzuxikari/how_to_use_diy_table_animal_crossing.pdf
    • https://s3.amazonaws.com/piwanisaj/gixubaditajelet.pdf
    • http://vebagakid.onlinewebshop.net/17208504308.pdf
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_8012ed1103ab4d61bc3f896c6ec95502.pdf?index=true
    • http://mewabetowa.myartsonline.com/10104186646.pdf
    • http://gubawakelu.onlinewebshop.net/64642638502.pdf
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_c5d1a2718b36440197e67514ccdf0f6d.pdf?index=true
    • https://19a39513-20cc-49d1-a75c-e30ce0314142.filesusr.com/ugd/f99735_3807cdb5d98d448f940c7341d8ecf508.pdf?index=true
    • 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_off0000ff68.bin
69bde22897e45f350f588f05c82e9617515e67e3a96134bd9331c76a61999211		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF68 5176 bytes
font_01_sfnt_off00011104.bin
63040e2ae8ff42ea92b606ef5d498870fe50c0479835e06ed918d3c2478d7ac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11104 10504 bytes

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