Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c32f1a1fea8a75…

MALICIOUS

PDF

50.5 KB Created: 2020-10-22 23:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 934c09f4bbfe311fcdb875c4fd2d99b8 SHA-1: 2de42baf29e317e8697609ff8add9360dfefdcd7 SHA-256: b5c32f1a1fea8a756fefceafc6104f1c0f5c265dcba1f3477adb6b5626717ee6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a lure promising game cheats, which redirects to a known malicious URL. The document body and embedded URLs indicate a phishing attempt designed to trick users into visiting malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit user curiosity for malicious redirection.

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://cctraff.ru/123?keyword=bombastic+brothers+mod+apk+unlimited+gems In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f8ff15863630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380228/normal_5f8c920323c0c.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/cf3fc542d3ad.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/rususosotetemut_tuvafirojono_vabawuvaxoxupe_lakonedimuno.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/poven-gusipuvegar.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/wonoti/xofubojime.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/keyboard_alt_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/actress_savitri_biography.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/28159377253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7579/6644/files/gariforanupadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9462/0333/files/false_cognates_list_english_spanish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3320/9243/files/wavitexifirulejezeliziw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac2518c-0c92-4877-80c4-9f5ad2077e38/12339289650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f776c0-4db8-4818-aff4-db353a48e029/dutavulewuxiz.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/18376320279.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/biology_gk_questions_and_answers_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/25647746726.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/mavifelamebejit.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/visejaxanujopisaveradobe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF0 5740 bytes
SHA-256: d83bf4e3d986b2f8a6ea5bdcca45cdaa9742954a448ff22972c48be2eff7fd97
font_01_sfnt_off00007e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E41 11120 bytes
SHA-256: a34a5474d8097dc3b52a6efbaad6400bf62d6a75c6baf735a6105cbf7e78818a
font_02_sfnt_off0000a4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B5 16272 bytes
SHA-256: 82b32699d950f0d2801881094b97f6a3b10b5d147672c8518649046776eee3b8

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