Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f4b761861c6507…

MALICIOUS

PDF

44.2 KB Created: 2020-11-06 19:35:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 60604435b11a6a43b1e09eb24c2966e5 SHA-1: d8600585e801f6445130f7b500a686fbf3d16cd8 SHA-256: 76f4b761861c65071f9599f742cdf0311df38c09b758180fb460bff7bb25d58a
96 Risk Score

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://traffking.ru/aws?keyword=the+lion+king+2+simba+s+pride+kovu+and+kiara PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379362/normal_5f9ca460ea882.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://uploads.strikinglycdn.com/files/86ec7321-220f-4295-93c2-7c43f51a885f/arc_measures_tangents.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d6445cb-2c7d-4856-80e5-93e3c4b487ed/soft_news_vs_hard_news.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/senanibafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a531d9-5b12-474e-b8a0-1b7acfa38118/yale_public_school._skyward_mis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a832da49-ead6-4a84-944b-76b00d4abbe8/39059708200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/904a9285-6bd1-45b3-a6e8-f606df2d3052/koxesetunamefogada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51bbb175-ad70-4597-a0e5-c1a59cb93147/76238246220.pdfIn PDF document text
    • https://minezonateta.files.wordpress.com/2020/11/71909694747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09d542b-fb49-409c-96cc-74833e066958/61617608759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ffb6423-399e-4ade-af09-aa5825a65fc0/zarixutotobonejikufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc3cfb22-9894-4804-bd6a-cc3ec90431a4/rawukidejelupeva.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/how_many_meters_is_one_lap_around_a_standard_track.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/antique_pocket_knives_south_africa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6119 5520 bytes
SHA-256: 3d5f571a9caaf22b40cf0a1222c09e323d5fd8f4d3b70d540c2c978be035860e
font_01_sfnt_off000073a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A0 10224 bytes
SHA-256: 3fdae12cee25f7a91e610aa7c7c4a41ec16194140e714e2c3e340ee65efe6bed
font_02_sfnt_off000095e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34