Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc955881cfbf3a3…

MALICIOUS

PDF

50.8 KB Created: 2020-11-08 23:51:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8e3268056c7e5665582ce71b21bfdceb SHA-1: e90b524176694e656d767149d98f1215e2e1819c SHA-256: 4fc955881cfbf3a3a07ad28d00d02dea9cef06df0e0f037092f4595460e1f300
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO spam or to redirect users to malicious sites. The document body and embedded links suggest an attempt to lure users with a movie soundtrack theme, while the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are to other PDFs. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://traffking.ru/123?keyword=guardians+of+the+galaxy+vol+1+2+soundtrack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5f914df4e5512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_5f93cab51ef65.pdfIn PDF document text
    • https://zebatezovas.weebly.com/uploads/1/3/4/6/134618099/c5585.pdfIn PDF document text
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/gekaniwubigo.pdfIn PDF document text
    • https://rafunegax.weebly.com/uploads/1/3/4/3/134350232/zabisadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373505/normal_5f933e327e452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420915/normal_5f9bdd3a91d6f.pdfIn PDF document text
    • https://xurajozut.weebly.com/uploads/1/3/4/3/134371968/divodowavoloke-kozufoza-tovefaporejupoj.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/dugibabafod/arrow_of_light_ceremony.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/jikebenafadutexe.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/nerupobafilorirelime.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/cambridge_igcse_biology_workbook_3rd_edition_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0f23f1a-aff6-437a-9fe8-a0524ec923b5/quran_english_translation_mp3.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_off00008247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8247 5792 bytes
SHA-256: a93c20dc930b8c51e54af498a9e5873d267eca0e7d4146c9de1bbf126d489dde
font_01_sfnt_off00009613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9613 12716 bytes
SHA-256: fa72426ed64e9e3e1a279bd89c0743bf156f13d5a0c6a80e9078efa9fee8d96e

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