Malicious PDF — malware analysis report

Static analysis result for SHA-256 f782a1f575c358d3…

MALICIOUS

PDF

62.6 KB Created: 2020-12-22 04:49:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5d4a7a88fc4c13e261514648fbe690df SHA-1: 9db30d0fb696e859d8d3be052da1aa1957f15e29 SHA-256: f782a1f575c358d3c91baff8d36bca97f3b73a778aa0a80ef2d4313440125f84
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure for a game or app download. The presence of a malicious redirector and the ML classifier's high confidence score indicate a phishing attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=wordscapes+level+8570 In PDF document text
    • https://zovarufegurer.weebly.com/uploads/1/3/4/6/134625168/9920113.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/kafijirugog.pdfIn PDF document text
    • https://zekenegelu.weebly.com/uploads/1/3/4/3/134390475/zerosuzunov_zarewiwumumoj.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/wegegera_tepizov_morupes.pdfIn PDF document text
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/fdf17a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc596b6c14dfd36fe116043/t/5fc7aadd09f4d56e8f8ccee7/1606920929049/video_calling_app_download_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/assessment_for_learning_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/zikokudiwuwagima.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/pevaxibalatarew.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/berliner_platz_2_neu_teil_1.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/zakosutatezosubopewo.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/mamobonoxezefetisijete.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b544c89e1c4b8fbd6471/t/5fc3ccb4f8cdb769c6578c75/1606667444497/81385299821.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_off0000b7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7EF 5680 bytes
SHA-256: b41dc237dff14327b44af090097ae7bf09b2ad81708eadbebe675e1100b51d10
font_01_sfnt_off0000cb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6F 10124 bytes
SHA-256: 7a29bdaaa6560b3b269d20bcf7958ccacbd45e072012836a4c049abcc70a70fc

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