Malicious PDF — malware analysis report

Static analysis result for SHA-256 2178fea18194aece…

MALICIOUS

PDF

40.6 KB Created: 2020-11-03 10:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 330fd2365681b08bbf6ca7b94e98503e SHA-1: 960d5c913c827287702704edee014f9f2c5be9e6 SHA-256: 2178fea18194aece6d5cd015c76ee36ba8d0fd949abab791226de85085fdf8fc
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://ttraff.cc/123?keyword=hamster+dance+1+hour In PDF document text
    • https://xasuvakem.weebly.com/uploads/1/3/4/4/134400919/jewesif_wakananuwoxune_lijumeguro_xesoli.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/wotuvewat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_5f8e0e0a3eac6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a843c8-2d64-4034-ae4f-46aeae1d2951/jlg_scissor_lift_operators_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/145c0590-fe55-41a2-907d-55aa938c97ec/campfire_song_ukulele_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/50389598567.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/how_to_type_alpha_symbol_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7badf88-b676-4480-9db4-0f0b01444987/eragon_chapter_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/552d1f83-5bd9-4d7a-b5a5-e0193646cb04/guxiwuzubiwefinawanakez.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/child_support_agreement_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/class_8_maths_rational_numbers_worksheet.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_off0000624d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624D 5160 bytes
SHA-256: cacde06e8c0748c87d13eb9b65b9ad6de800e2037da9ef5fd3ed8eb6ef1ddf28
font_01_sfnt_off000073ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AE 10196 bytes
SHA-256: 55a94a33263d8df90e3f71cff346f7988ed49e90720a234b0da789022abfc281

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