Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5d27ab2b00b6ca…

MALICIOUS

PDF

52.7 KB Created: 2020-11-08 05:34:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b77a1f049b80cb99d5de6cd867542f4f SHA-1: 89a4f86b5706705fcdc3c022950d503d4e886081 SHA-256: be5d27ab2b00b6ca0ca4b08ff44c80aa7b28fd5dd2dd9f5cd8d5ebef46aa0279
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, masquerading as a worksheet answer key, which is a common lure for SEO spam or phishing campaigns. The ML classifier strongly indicated maliciousness, and the presence of embedded URIs suggests an attempt to redirect users to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://traffset.ru/123?keyword=3.1+succession+pogil+worksheet+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5f8f4d3f5b47f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5f8e6eab87d27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_5fa217618c5a2.pdfIn PDF document text
    • https://tivexafo.weebly.com/uploads/1/3/4/3/134348633/jabogobopiribi_xemamum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5f94d80717259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405660/normal_5f92163f3b853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447874/normal_5fa3d3ae3c003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393791/normal_5fa481d2e824c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421218/normal_5fa21021b7410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f88950f73d57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f9b1e9eb9324.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kuvusetile.files.wordpress.com/2020/11/i_manoharudu_naa_songs.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_off00008ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE0 5604 bytes
SHA-256: 7c250b7823755d8b455d6e35fd0dcb903b57084106f16b85ee5c7de90b8a3bc3
font_01_sfnt_off0000a019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA019 11352 bytes
SHA-256: fce54ea84bd6e83a22616aac4bf7ffb922c0f90ca15219bb14e18a8a88d87a91

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