Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ab4db522bb760b…

MALICIOUS

PDF

43.3 KB Created: 2020-11-05 21:27:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d8b49fbb2cca66b5900a2adbe0e8f791 SHA-1: dcded4c5c78073057e5ce0792f30e161050c45dd SHA-256: 82ab4db522bb760bfe2a7cce83f0353d9427c1f3c922bf620a349121f77e7879
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/strik?keyword=cast+of+shooter+movie+2007 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f8736018d18a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391624/normal_5f9000f39e609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f8740961bea7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5f888cb1f0dcf.pdfIn PDF document text
    • https://jojawetoterul.weebly.com/uploads/1/3/4/4/134404105/mepebezuzijuse-gevakom-juzamudetesas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/61ea4a84-bd1c-42ed-a05d-b4142956cd39/raj_comic_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c060de8-3f77-4ebe-9eed-bc2cc343cbe6/xakibarezojalobug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d0d892-0f32-4eb3-a0c7-776f08417464/31785245508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6824ef88-bcf0-483d-ba98-8f13b995cc06/download_efecto_mozart_para_bebes.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/wilukamujakozela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d125af8-24cc-421e-ae96-9ef50ea8dd3d/32235552009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f58a7a-58af-4238-9a77-071d6617959e/introduction_to_thermal_physics_schroeder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd706529-6262-430c-8ac6-e08a7e77b299/39455287324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bbe7e90-c548-48cd-8820-55b577b59f93/towajufenimenofura.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 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F0 5292 bytes
SHA-256: da197ee36cf8d29b2a6dfd4abf372244e11fb2c7defcdb701d7d965ca5126f93
font_01_sfnt_off00007bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD1 10944 bytes
SHA-256: 3256aef167c44475a0b69668455d2d160851a86d4dbfde52a207b232a64f0946

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