Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63cd5dfbdc301bf…

MALICIOUS

PDF

64.4 KB Created: 2020-11-02 22:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bec8104b948c896b7df5a07056a8a6c5 SHA-1: 1ca33ffff18a4326611af9429de5558cd9af51e2 SHA-256: e63cd5dfbdc301bfbde1d1dc0499b6dc2ab876ae2f5df6bb8372baea40ffbe15
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text and URLs that suggest a lure to external content. The presence of numerous links, including one pointing to known malicious infrastructure, indicates an attempt to direct users to potentially harmful sites, possibly for SEO manipulation or further exploitation.

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=words+that+start+with+twe In PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/kaposixubu.pdfIn PDF document text
    • https://xozavakude.weebly.com/uploads/1/3/4/5/134581018/08e8998.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/fitakojemefoxetilaj.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/bokofapig/how_to_type_alpha_symbol_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b25ac6f0-fd25-4852-8185-2c9fc4373be0/kaweb.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/loniroxetik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fdfe7ff-5cea-43ac-9ab7-25dcbf94eaa8/80277664814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed27f7b-07f2-49bf-8ac9-c2d83cec92b6/biodata_form_philippines_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5968a2e4-6082-4d31-8212-c76f9178a871/2791592419.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/guia_aceites_esenciales.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/danojuz.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/20975422987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f09b811-8ef7-4a77-bb4c-74d10823c823/45827825369.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/zikiwiwabukaxazenadi.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_off0000bb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB5D 4988 bytes
SHA-256: 18a0cf0ced009bba7fc93c072ab61bb9ce7ae22d0a9dcb390ffa88ce4a32f47b
font_01_sfnt_off0000cc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5F 12288 bytes
SHA-256: bb69480e2e854ad15eee02f41bf68a61f3f67bf3c179f436964e50664796de84

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