Malicious PDF — malware analysis report

Static analysis result for SHA-256 57cda102a692cab9…

MALICIOUS

PDF

77.6 KB Created: 2021-03-31 07:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c5bfef4cbdbd3a8d92658a1960a7602 SHA-1: bc1d49e30a90e0c3f69ef8cc486cd7405d625473 SHA-256: 57cda102a692cab9fa5263a588284b51c430b4fa7c60806fbba7c7b1a1b564a4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect the user to a malicious site, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/wix?keyword=pericles+funeral+oration+questions+and+answers
    • https://cdn-cms.f-static.net/uploads/4447916/normal_5fd7106b7573c.pdf
    • http://zekaxezixil.medianewsonline.com/lakuga.pdf
    • https://cdn-cms.f-static.net/uploads/4446273/normal_605fe3ecd8753.pdf
    • https://cdn-cms.f-static.net/uploads/4380707/normal_6009ae9c2282d.pdf
    • http://bivaxopepukoxi.getenjoyment.net/frequency_adverbs_examples.pdf
    • https://cdn-cms.f-static.net/uploads/4476596/normal_603e274c48c4d.pdf
    • https://static.s123-cdn-static.com/uploads/4529780/normal_5fd04cd067da5.pdf
    • https://cdn-cms.f-static.net/uploads/4468836/normal_6049e614b498c.pdf
    • https://static.s123-cdn-static.com/uploads/4467581/normal_60061ebe60b97.pdf
    • http://newuwedeza.mypressonline.com/amazing_grace_bagpipe_sheet_music.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://limoxukuk.atwebpages.com/instauracion_del_modelo_neoliberal_en_mexico.pdf
    • https://87098103-4d08-48bb-90a6-807b0ef734b2.filesusr.com/ugd/1f49de_ffec444f72fb47f7b99940cb69815f62.pdf?index=true
    • https://1580f21e-fc75-4350-9669-3be8b7525729.filesusr.com/ugd/eff6cf_0952d871add64f1ba967c1a55b44fdb5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/14cb7fb0-087c-4f00-9957-ae4b4fc1f173/briggs_and_stratton_550ex_140cc_parts_diagram.pdf
    • https://ee809a51-a58d-41df-a269-13688c4e1c69.filesusr.com/ugd/5f587b_b41c3139a4e340b685d66717ffa4a8a1.pdf?index=true
    • https://s3.amazonaws.com/daraniwekamidir/zijesapivamomaxuvux.pdf
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_3d218363dcc24b1c8d08911a8b36e0c2.pdf?index=true
    • https://f27bca7f-571c-471d-9e77-92385e6dfcd0.filesusr.com/ugd/9a0fa1_e03d5b609f6847adb55ccefc7964cccb.pdf?index=true
    • http://zikoliduxa.atwebpages.com/fewufiwokaduvekol.pdf
    • https://uploads.strikinglycdn.com/files/2b2ee15d-6b59-4e97-8a54-ce2c063759c8/tixakikekukokiginidixewir.pdf
    • https://s3.amazonaws.com/libeganot/how_to_program_a_baofeng_uv-82_radio.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_off0000f363.bin
4e413d2993241531e4a41f0249f6d437106b0a4c7a502b8037f82541277f5906		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF363 5232 bytes
font_01_sfnt_off0001054a.bin
71a0bb0cd5f8dd1886594d9e50ec502d89d86ca306e7c43fb757b2aadfed0b06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1054A 9904 bytes

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