Malicious PDF — malware analysis report

Static analysis result for SHA-256 b205d3e50e577e65…

MALICIOUS

PDF

77.5 KB Created: 2021-06-01 05:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ea430edb063dc790f19720ca964445eb SHA-1: 5039bc955a7cbcc1c32195ae3666436fb0d63084 SHA-256: b205d3e50e577e654b3405df3fe28b2a83ed17bfc0f894dd5750825a45ff5e1c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a site offering a modded version of Clash of Clans, a common lure for distributing malware. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious download. The document body, though heavily garbled, contains references to the lure and the wkhtmltopdf tool, suggesting it was generated programmatically.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/123?utm_term=clash+of+clans+for+pc+mod+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471479/normal_5ffdd244554ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483587/normal_5fe07e8ec214e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_6035c33cd2562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467573/normal_6032111dcbc66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_601fd1772938e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423427/normal_5fc63ca7d829b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_600c36eef0585.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/41b872b2-4c91-4af0-9c35-8542a20e27fe/24549325292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64689e96-bba8-42c9-b4b9-b7187befe52e/40366921468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98ae724-ba81-4d29-a507-13802e7299ad/88432412299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c8f0c1-6793-4dfa-b0b2-0fe535a44d71/what_to_read_after_the_all_souls_trilogy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ddb2fc0-9602-46c5-b786-dfab7768c520/conditional_statements_practice_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7770c9d1-1ecb-4f31-a1ca-11acf456faee/38843529428.pdfIn PDF document text
    • http://zigunef.pbworks.com/w/file/fetch/144435045/xutovibupuvozomidub.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/talking_tom_gold_run_mod_apk_download_unlimited_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae003cf-aaa2-47d3-9269-4e9ccca37d87/champion_7500-watt_dual_fuel_generator_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c7c599-725d-41aa-b2c7-d7f1989afa85/attack_on_titan_game_unblocked_at_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d885a672-5912-43ac-b86e-7533377533eb/zebedego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6de405c-8403-48d0-8de8-a5d166140b62/40801071837.pdfIn PDF document text
    • http://veweran.pbworks.com/f/how_to_pair_two_anker_soundcore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d237e9-d6eb-4b44-b980-bc2d7d751e59/dijipisupepominakix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39f865b9-6e3f-4173-9b29-94984127223c/norcold_n611_reset.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_off0000efaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAA 5364 bytes
SHA-256: d5dba8a6fba018c9a1b1e83440855d394724f2c397d590cf9194a61a14cee406
font_01_sfnt_off000101bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BC 10856 bytes
SHA-256: e1b90863a4769b125092fe1f8ee1664dde29cbdab0e354ccc45fa47adb438319

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