Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a4db0e620a1bef…

MALICIOUS

PDF

41.4 KB Created: 2020-11-06 19:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 54ee5700cf5241808f8b304619d29cf9 SHA-1: de62674b1563473eceaf1d797abde958469d9fa0 SHA-256: 07a4db0e620a1befc94b7af6824be51b54aa318644e5f2ff1be1e11207ad4da7
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One of the primary links directs to a known malicious redirector, indicating an attempt to lead the user to malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/aws?keyword=caddie+woodlawn+pdf In PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/gavojufa.pdfIn PDF document text
    • https://nutefowamedez.weebly.com/uploads/1/3/4/3/134330341/9410153.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/susopuzupure/jusavajeluwizogesez.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.pdfIn PDF document text
    • https://zogidadovo.files.wordpress.com/2020/11/6709642518.pdfIn PDF document text
    • https://zivujege.files.wordpress.com/2020/11/2878917950.pdfIn PDF document text
    • https://degevojuda.files.wordpress.com/2020/11/73115565781.pdfIn PDF document text
    • https://rezabaxew.files.wordpress.com/2020/11/sogilugovut.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/shortcut_for_closing_tab_in_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/is_the_movie_pihu_a_true_story.pdfIn PDF document text
    • https://pupejuw.files.wordpress.com/2020/11/rutuwefopelewuson.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/cambridge_igcse_geography_study_and_revision_guide_david_watson.pdfIn PDF document text
    • https://pedaxuk.files.wordpress.com/2020/11/vobedum.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_off00006473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6473 4756 bytes
SHA-256: 538eddf1dea3b22c752c93328adc0aa258235bea9a1f4603d2dbab3efadb6683
font_01_sfnt_off000074c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C9 10640 bytes
SHA-256: 6a61f8313e639976bdc5c8d6f319591d63abce1a533af407585a12035e31e3bf

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