Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f5de688182d5ee…

MALICIOUS

PDF

77.7 KB Created: 2021-03-28 22:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea8ba750ff80fe1a46b9e798a487f8ba SHA-1: 52f392d0e735a42296a24cc8a6f5ac4b1ef5d1e4 SHA-256: 60f5de688182d5ee8e1ac2820cd2bf19f36ce293e4fb0cdc3a96efd9f2e270ee
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a link farm, containing numerous external URLs pointing to other PDF documents. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of generated links, suggesting an attempt to manipulate search engine results or distribute content across multiple domains. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of many external links implies a potential for malicious content delivery or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=ffx+sphere+grid+differences
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/fewefotef.pdf
    • https://rulovuwupe.weebly.com/uploads/1/3/5/3/135386045/5808185.pdf
    • http://samoe-samaya.ru/kotujidubal0apz0.pdf
    • http://genusttwsr.fun/lifakifncqs.pdf
    • https://didunoduwogu.weebly.com/uploads/1/3/2/6/132682107/8373812.pdf
    • https://xuxijirabof.weebly.com/uploads/1/3/1/4/131406659/lulepila_vavekiz_lowowe.pdf
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/9d9b80f0.pdf
    • https://gesofomudejow.weebly.com/uploads/1/3/4/3/134344239/xawuwutoxajulis-pupogimagilexa-pokakaku.pdf
    • https://zegaxazidunuxe.weebly.com/uploads/1/3/4/7/134746987/rufimego_povemut_fikejupisedem.pdf
    • http://trackcreditscore.info/zexexuzumamadokasokoza58.pdf
    • http://ooovseanalizi.ru/68359210602rbhc.pdf
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/778381.pdf
    • http://edarudost.online/xixoxiwaxolulokirawuvuta09sfo.pdf
    • https://funujitumim.weebly.com/uploads/1/3/5/3/135347265/dumuviwa.pdf
    • http://lakcherie.ru/modusubaxepajou5lc.pdf
    • https://devigejijakefu.weebly.com/uploads/1/3/2/7/132740662/5557419.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bc110034-a94f-4b74-b372-2b070c75a173/fizokawelinezepejoxaniw.pdf
    • https://uploads.strikinglycdn.com/files/8731022e-c446-4efb-9880-25f628e736d4/rutoxel.pdf
    • https://uploads.strikinglycdn.com/files/4f943258-605d-45e4-9432-e2423ca5a004/estudio_biblico_de_la_historia_de_jose.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f31d.bin
2d2f8bd1829705cf92306fc9687f3e8a46cfa094083b12d4fdfd4a199bf5cdda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF31D 5196 bytes
font_01_sfnt_off000104d9.bin
1f3c42e031d1542b960debefa0803e0b69f9a40370a819d41735f66e70e0c3cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104D9 10824 bytes

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