Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a303470bf77d9db…

MALICIOUS

PDF

66.9 KB Created: 2020-12-27 12:37:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9f5c3ded35513f4d9fc7f6942bdeb9d1 SHA-1: 12c1874694273afa083891286489330e227fac34 SHA-256: 7a303470bf77d9db67e82ae88fc9c7d06dac1d408dd394d6c0753f25348f71c7
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 0.9998

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://traffnew.ru/strik?utm_term=trench+assault+cheat+apk PDF link annotation
    • https://todurudivi.weebly.com/uploads/1/3/4/3/134344361/5ebdc2.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/belufokomodosijimona.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368953/normal_5fe0b07d08596.pdfIn PDF document text
    • https://tunejipurebodo.weebly.com/uploads/1/3/4/3/134342488/sesun-zidekorepuv.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/faW3kih/bubble_shooter_3d_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425507/normal_5f97e78ae6b87.pdfIn PDF document text
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/fapeve_rogupufowituf.pdfIn PDF document text
    • https://zofekumu.weebly.com/uploads/1/3/4/7/134741387/nabuzusenomuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/concise_medical_dictionary_for_java.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/18511849737.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/37800091676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2a59a4-2c68-4773-9105-71cf562baef9/fotovavefifesuxeleni.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/en_femme_for_halloween.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acac8450-dce9-43ef-a630-ccbd60077c54/16448536551.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_off0000cb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9E 5036 bytes
SHA-256: aba9d0a74add1b59cad15c7203f5fd51bbef6c723c7e3607c25d717891b44798
font_01_sfnt_off0000dcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB7 9972 bytes
SHA-256: b8a906390cadcc1a14c82a2240c2a8f44430ceb6a054341543ef03aa285cd425

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