Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07f518f0b7b142a…

MALICIOUS

PDF

60.3 KB Created: 2020-11-19 19:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f24b3ea831c369ce3ef2374cea6ca928 SHA-1: ddee55b3c3862aca2fd1abe47cd136b0098c05ad SHA-256: e07f518f0b7b142afd5f11f5d4955674b29db99eb6807d72f1c6c84908b02856
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 0.9996

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?utm_term=modern+physics+pdf+by+murugesan PDF link annotation
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/nerepubowamot.pdfIn PDF document text
    • https://tozijaletaxe.weebly.com/uploads/1/3/4/3/134312516/tufupajowivi.pdfIn PDF document text
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/gixinedijeronidibu.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/wovanul_dananilapebe.pdfIn PDF document text
    • https://zolefixu.weebly.com/uploads/1/3/4/4/134432518/7130af0e0f0a05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/remuv/pefebuxirugagukozuliwiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/6550636515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5fcceed-276f-49c4-b500-7b5a9c5f0300/linunofav.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/almacenamiento_de_energia_solar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2baf130-f7f0-4852-b436-0a55a0e62a37/download_apk_adobe_flash_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01959501-55cc-4f6f-b766-9d6a09ad5c78/sefuparebubezoxagisa.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/66157061084.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/gabatujaseze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df040466-d398-49ff-8484-118e098208fe/the_ex_games_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/donafemilerujakomimofa.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_off0000af18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF18 5784 bytes
SHA-256: 37f79547e974ade748b7a9920f37852c55d62622f30b9caab56e5b1d0fdc065b
font_01_sfnt_off0000c2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B8 9896 bytes
SHA-256: ef3a32e2d4fa76e2f23843213ca110838e819a42e724c6c5a7a37a9f8b2e20ff

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