Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8d65573d0bd60f…

MALICIOUS

PDF

80.7 KB Created: 2021-05-24 01:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e2426b66202c148cb087ac41ed140386 SHA-1: 8192489326968515538ba56667b78028390bdd66 SHA-256: 2b8d65573d0bd60f579f4b0ded785be18e81a6b1b83f019d4861191d80de34fc
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for further exploitation or credential harvesting. The document body, though heavily obfuscated, suggests a lure related to 'balancing chemical equations questions and answers pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/strik?utm_term=balancing+chemical+equations+questions+and+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387061/normal_60155c2aa5cd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_601d502237214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417212/normal_60310994b1350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456687/normal_5fd6dea18f32a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445879/normal_604848ae3c669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_600c7c346ee3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480758/normal_5fd95aea2b94d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487197/normal_605906054a4d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418755/normal_5fd84df704111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474231/normal_604ddc0f5c8cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480174/normal_606c89bd69e7f.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/cbfc8969-a413-4457-a077-d75d23a0fada/samsung_ue32eh5000_remote_control_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e61d6ca3-02f5-429b-aa0a-4815563139af/6766027444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e49f24-8139-4436-8474-43192761642e/34536143883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83665b3-9be5-4eee-9b7a-8ff79f63ab26/tipos_de_migracin_interna_y_externa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c0c260-07d3-40cf-9845-66248e60b073/position_of_english_as_a_second_language_in_india_slideshare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/143945d6-7369-4979-a703-eb5d9340a8c8/biwevumebutavexoxevos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6af1f0-3f3d-4a31-a77c-9dabce2ff4c5/first_aid_cases_usmle_step_1_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d42463-6d7b-486b-8602-a99528c4758e/tewakapenezoweri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee1db1b-40b6-43e0-8733-8d1c105c3c38/ibig_sabihin_ng_poster_making.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc6e15a1-ed04-49e4-86b1-faf13d4454a7/descargar_libros_de_programacion_neurolinguistica_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba50cbbc-e95d-4521-b70b-181f8de003ff/how_is_washington_dc_different_from_other_states.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/968ec4c4-f1f3-445b-9169-7e936dbe2944/85802241429.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_off0000fc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0F 5836 bytes
SHA-256: 4485bc5bd0d698399f88d627c952c62bcd7d69c42f668d52e7427f8bfb694e0f
font_01_sfnt_off00010fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCA 10880 bytes
SHA-256: f3e192c22bd55c960b33a92d6ea8ba83af5899f9694dd9e0469de5996aaa661b