Malicious PDF — malware analysis report

Static analysis result for SHA-256 93794a9113ceccd3…

MALICIOUS

PDF

39.6 KB Created: 2020-10-03 18:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 56c96821c76ad7d2cce2b77673297b8f SHA-1: 7b73af0850ac67e07c3cae330007d97b8ba756af SHA-256: 93794a9113ceccd3be08a5c811dd3eac2da15db27972e7905aff90ea6610c3ef
170 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains embedded URLs and appears to be designed as a lure, possibly related to a legal petition, to encourage clicks. The presence of a large number of external PDF links further suggests a link farm or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/strik?keyword=casey%2527+s+law+petition+pdf In PDF document text
    • https://site-1037055.mozfiles.com/files/1037055/85842960740.pdfIn PDF document text
    • https://site-1037828.mozfiles.com/files/1037828/53717083481.pdfIn PDF document text
    • http://files.jbaumgartel.com/uploads/1/3/0/7/130739095/tumuzuriju_dosimudevutezim_gixosofebasizu_saxemotetutu.pdfIn PDF document text
    • http://files.msjchem.com/uploads/1/3/1/4/131437409/biketiz-devujuxut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7241/2055/files/gekajezevigixirata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7818/0259/files/relebujoguxexelipukelenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/26387743443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6653/0721/files/16460674869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/jinexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5627/3310/files/where_is_agi_for_illinois_taxes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8916/1128/files/uil_state_track_meet_archives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0098/9349/files/hoover_rec_center_membership_cost.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_off00005ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE0 5072 bytes
SHA-256: 04183374f0ec4603aa55dabe40c39e1f235bee80dbe61f5f8c93c0313fb8b25c
font_01_sfnt_off00007054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7054 9808 bytes
SHA-256: 543d743549e7f80120cbb40d3eb3e772e7bf48f27eecb32d7ccdc233b6b3670b

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