Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f20afcdcb7473bc…

MALICIOUS

PDF

44.4 KB Created: 2020-10-02 06:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aa6fc6948f74f4052f6d76c30fafe251 SHA-1: 299adeca574d80617bac536ddac7cee3a115213e SHA-256: 3f20afcdcb7473bc90b546ec2a8848e1eec61957e29f57a6c1d6915f8dbab8df
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

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/strik?keyword=exercice+corrig%25C3%25A9+energie+solaire+photovoltaique In PDF document text
    • https://site-1037075.mozfiles.com/files/1037075/1562025644.pdfIn PDF document text
    • https://site-1039295.mozfiles.com/files/1039295/54325044973.pdfIn PDF document text
    • https://site-1037824.mozfiles.com/files/1037824/demivazafurebepa.pdfIn PDF document text
    • http://jetarejob.papayacast.com/uploads/1/3/1/4/131407408/lusesisomipuwig-doduxusorap.pdfIn PDF document text
    • http://ferotaf.danielsitaly.com/uploads/1/3/0/9/130969418/pixoxigazajubelat.pdfIn PDF document text
    • http://files.villageoftriumph.org/uploads/1/3/1/4/131453733/kugudufeb.pdfIn PDF document text
    • http://jaxev.redshoeeventorganizer.com/uploads/1/3/0/7/130776083/5363297.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://uploads.strikinglycdn.com/files/55c0f61e-1100-4a87-9bc1-b0dac29e0162/bapaxenig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/cst_science_8th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/95600833878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8646/6210/files/sakugedusamoninipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8398/8125/files/stellarium_user_guide_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9418/4607/files/shooting_star_dragon_tin.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_off00005dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBB 5428 bytes
SHA-256: 9a5e62e8397902676a2b40475212796980fb7a62efe2c89cea638f5ce1a5c141
font_01_sfnt_off00006ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF4 11464 bytes
SHA-256: e9af7f93811881bcded37ce707da0ba88a72d49369422a67e21903ddbf2c529e
font_02_sfnt_off00009442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9442 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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