Malicious PDF — malware analysis report

Static analysis result for SHA-256 824bc5f2561b9991…

MALICIOUS

PDF

47.2 KB Created: 2020-11-07 02:01:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f522eebb74e554b2c88440a7c44aa606 SHA-1: 219612bb68222c64dd12f935acee67e7f9306812 SHA-256: 824bc5f2561b99911700b893aafaba038c31822e03f2ddb9fea4c989a99df9e3
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 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=a+child+called+it+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374685/normal_5f9db81bbdaa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5f88ae7512a10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417221/normal_5f99e0bcf3c19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447273/normal_5f9e8a0e40890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_5f8d351b821ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5f99f06e988cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5f8dc9417ccd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/76274854540.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feee215b-e11a-46df-a1df-0b20a39f17da/67486485234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0dcbb0a-79fd-40cb-95fd-fe54c806e946/papas_pizza_games_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/79243930715.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B82 3928 bytes
SHA-256: 2d60d34f2b2ab595f4cac793da8db4551c7555f4d2db8e8582d528ed0fdcb733
font_01_sfnt_off0000796a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796A 5056 bytes
SHA-256: 29974711f3370350903ee6088f6054d5f2a60f0adfae599bcb9447b56c694be1
font_02_sfnt_off00008a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A98 11228 bytes
SHA-256: 7cda39f6368a7d06d71d62ee69dffb38444651fdf3fa94159589ed63374aa856

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