Malicious PDF — malware analysis report

Static analysis result for SHA-256 14307874e9038b9d…

MALICIOUS

PDF

49.1 KB Created: 2020-11-01 19:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ca459f06dd627d40a75de6c304c89f91 SHA-1: d823c389357b3438bdc7baf0b76b9d3ea7323897 SHA-256: 14307874e9038b9deaa8501ad0d904294f309bbfd27f737a60631e4a0280cf5d
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.com/123?keyword=soul+eater+death+city+minecraft+map In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8a93056682c.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/rilamesufavejidadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5f908354ac8ed.pdfIn PDF document text
    • https://penepanixefi.weebly.com/uploads/1/3/4/3/134354239/9051279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f8aa1d63b225.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/fb4a325d-a257-4a4d-bfcb-5b949f93cc65/likixokepopifarixajez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cc8ba0d-fd68-4450-969f-8324dddf18c1/vulikixajilogumefogux.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/jawuvebukexep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f67ba3a4-b6a6-4a1c-8eb8-df20ccaaadfa/c43_amg_bhp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45b6bf1-c562-43c5-878b-31f60b0407d7/occupational_health_assessment_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e931bca7-55d3-4b00-849e-293dcd464d85/59170754587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1fb0aef-39b8-44c8-8d36-06551cac86fa/91537005002.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA6 3028 bytes
SHA-256: a8bb295adce06666852798224f8c17cf63d4c16f7697ae4b42c723da0a07d689
font_01_sfnt_off00006682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6682 5424 bytes
SHA-256: 0cb0eff8be60fade05ebb073e346309fe407f94c391ea69c182787e640430655
font_02_sfnt_off000078d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D5 10996 bytes
SHA-256: 59d45f009fba63b159f967229e3272cca570e731a58b03e24ba1e533f919124b
font_03_sfnt_off00009ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA0 16204 bytes
SHA-256: 514ec34c774379c82780ce3b826aceada3291152a2a4734d997485cf707bbc49

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