Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3f8c85fbb8ffc6…

MALICIOUS

PDF

75.1 KB Created: 2021-02-24 03:04:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1acf1449a4b0690c532af776c621805c SHA-1: 08ac0c87d74af509ee24cd4f0b7cbf712fa2b430 SHA-256: 2f3f8c85fbb8ffc64a8a2eeb9f602ac04dd7f2a4ef98e771798710c37eb1a36f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=radian+to+degree+conversion+worksheet PDF link annotation
    • https://kebafilononuxo.weebly.com/uploads/1/3/1/3/131378837/xovofu-zirifobane-wevulipabadifam-zobut.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/30ae5d7907.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453732/normal_5fcbd1815a9ba.pdfIn PDF document text
    • https://gojenegitoz.weebly.com/uploads/1/3/4/3/134387591/mofuj.pdfIn PDF document text
    • http://diduziwiti.22web.org/zivarakaxasifiwusekixava.pdfIn PDF document text
    • http://pevetune.66ghz.com/financial_ledger_template_excel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466379/normal_5ff812a729307.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/mailtrack_android_gratis.pdfIn PDF document text
    • http://dexifuv.epizy.com/70687989045.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/aol_application_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/87059273549.pdfIn PDF document text
    • http://totexamivemasal.epizy.com/how_much_does_a_6_hp_honda_outboard_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/tatimem.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC16 5180 bytes
SHA-256: 58a695f98cd74caa01893a9553476bf2b872dc7fa139d558dfcac4e49dbae7e6
font_01_sfnt_off0000edc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC5 10452 bytes
SHA-256: d3bd27011134ead7c285938ea3fbe2ee29eb0aad5d64d7f3cac9550ee99ab885
font_02_sfnt_off00011184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11184 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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