Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17c8a561db69a2a…

MALICIOUS

PDF

74.0 KB Created: 2021-03-23 14:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 45b77638cb4f57937027cc9d464faa43 SHA-1: 54714e05c51c333e185f905bcfbe77332b38d254 SHA-256: f17c8a561db69a2a9df3a819917498424c85e7975b0f48c8f5843f99c053232e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://golowaki.ru/123?utm_term=betty+crocker+dinosaur+cake+template PDF link annotation
    • https://ralunudedosamot.weebly.com/uploads/1/3/4/8/134856058/641a1b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454422/normal_6045e315ebff4.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/83396857928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_5fdb56ad16547.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/what_is_meant_by_human_development_report.pdfIn PDF document text
    • https://kugugurufive.weebly.com/uploads/1/3/4/1/134108893/gakode.pdfIn PDF document text
    • http://rumepado.mypressonline.com/gazunuvifupazixir.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://s3.amazonaws.com/gekojulog/tottenham_fifa_20_career_mode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/zopixusewulepid.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/braille_academic_reading_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/lazosagi.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/dopomedusimupiburilinejok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac7f5c51-854e-40c7-ab51-6b69658f6c50/14128469629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e500b0af-8df7-44a7-8227-924151e0b33e/japatosajuruvota.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/zefonilinolu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCC 5316 bytes
SHA-256: 806ba16a968e0ff2c78982a8521f10034690872ca0e56dfb2ca3cdbb9b95bd70
font_01_sfnt_off0000dfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000e857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE857 10544 bytes
SHA-256: 8b455d4b8c74f5bc0ae8d70a06176a36f5a59016c3e76bf6daa8921e45c25f8b
font_03_sfnt_off00010c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C73 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

Open this report in the interactive analyzer, or submit your own file for analysis.