Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf5cbdd34071dff…

MALICIOUS

PDF

40.0 KB Created: 2020-11-01 21:36:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e7245c10c4cfc58e7a01e6006ad324b2 SHA-1: 19c88962a71a5babfccf27547048c977397e62a2 SHA-256: 9bf5cbdd34071dff80bf7743ecbcd315479cdd6b89873f533b1382c1aef9c843
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely the primary mechanism for delivering a subsequent malicious payload or directing the user to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/aws?keyword=8+of+pentacles+tarot+guide In PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/dokiwanisexowes_wamapivunuxep_gokofe.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/gavubodogelivufifo.pdfIn PDF document text
    • https://jejabulalirolu.weebly.com/uploads/1/3/4/4/134464322/6013355.pdfIn PDF document text
    • https://xowilululevala.weebly.com/uploads/1/3/4/0/134017879/sivil.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/fatikonavori/53052170324.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/super_duper_game_cartoon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2118/8251/files/fowolosozit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd33ee4f-69bd-45ef-9db3-621bfb655175/70536154356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb62e99-581f-44cc-8522-247fae5df84e/hotel_chart_of_accounts.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/divixuginojedu.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/convert_to_word_mac_os.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/74980951111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e30cfb04-3389-45eb-bd53-62b1d4a6585c/fexiboxofutobidu.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_off00005d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5B 5420 bytes
SHA-256: 44fe335d234ec9a2a49ff89f64ba391e9248dff4ef7db3d29f1a6e6aab3b3682
font_01_sfnt_off00006fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD7 10444 bytes
SHA-256: 83a775304646a78af2915e097e9c7090ea41e5399b56f6ac5418426d8adabd02