Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12997c214d73c14…

MALICIOUS

PDF

43.1 KB Created: 2020-11-04 00:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 001402eed7fb7865057233f697e928f0 SHA-1: 53cf8eea3e4a3b5d7db6a59cceca8f3aabf355c7 SHA-256: e12997c214d73c144d965c136634a3d2bd1b5473ea14a430f3444c44078f1cf5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/123?keyword=mcgraw+hill+math+workbook+5th+grade+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f9064bccc61a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375210/normal_5f91e5c5aa0d6.pdfIn PDF document text
    • https://kidivine.weebly.com/uploads/1/3/4/5/134576756/radadoji.pdfIn PDF document text
    • https://liforofejot.weebly.com/uploads/1/3/4/3/134350560/kupotubezeravabag.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/c6e36bda-95b9-4319-b55c-e7687d822724/bofudixijasinikev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f472e39-ead7-46f1-a1a2-e6d056e00a48/52567136506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67629da8-6c9a-4990-bf52-3578fcb1e399/68243199121.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/48051380267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8461c9c-5373-4bd5-af81-e1fd4308507e/watch_cloverfield_online_free_megavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46f73039-4d04-45cd-a2fc-2264a416568c/kofotikito.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/abnormal_psychology_exam_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/ccat_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/montague_high_school_pei.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7d87812-7ce0-40c1-ad27-dade4853d8f1/john_deere_425_technical_manual.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 7

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_off00006898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6898 5816 bytes
SHA-256: 6ee6a66ffc3ef3fe0bf608e465018108c2e853fd546ce39cd3011c1150c45783
font_01_sfnt_off00007c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C56 10396 bytes
SHA-256: c6edff8676156f4101d206cbbf68b5ef5ea21aa180065e111a42f9c132e0cb7d

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