Malicious PDF — malware analysis report

Static analysis result for SHA-256 47886dd962c4a785…

MALICIOUS

PDF

80.0 KB Created: 2021-04-11 23:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: dbfe9269218bfff75ef2b878b8d67606 SHA-1: adcc267c9ed94a31039427f957b41d11e8a1a7e0 SHA-256: 47886dd962c4a785b600f272bedc6d08c5d5b6a0c9c3fc7e51b15ec07068f967
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO manipulation scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/strik?utm_term=the+role+each+organism+plays+in+an+ecosystem+is+called+its PDF link annotation
    • http://pristav.pro/xorunanoxanabugoweloet0gi.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/jhEhgp1/68314457874.pdfIn PDF document text
    • http://ledimpress.biz/nissan_370z_facelift_2018_interior5wskn.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/h40hboF/73830161585.pdfIn PDF document text
    • https://cdn.sqhk.co/kipasewimoni/lijp8hh/banjo_song_free_pagalworld.pdfIn PDF document text
    • http://ukranews.site/nilenigomobeperodujq8u4.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/jb7d0ig/31362957852.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d74058ad-8c31-4576-aeb4-582a73b10e1e.filesusr.com/ugd/666c83_3fa152694a4b47feab8276181a3901b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/bojumusagifunita.pdfIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_e86d9f0abb6d42bcb2ec558d60ae2693.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/toro_timecutter_ss5000_mulching_blades.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/how_much_should_i_pay_for_logo_design.pdfIn PDF document text
    • https://d6477b75-8e4d-4453-8bbc-a86a6009e57c.filesusr.com/ugd/261d41_fd6d91d9e9c34129a2b3f2161214d1ff.pdf?index=trueIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_5402e7bcf7e44436b4a03f0fa7b841f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/fagakinetefenudijimedunuw.pdfIn PDF document text
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_9ce8dfb3c8644e5ca8d12fa04b959130.pdf?index=trueIn PDF document text
    • https://b1f0a730-f0e4-4bcf-918d-a915077b90d0.filesusr.com/ugd/a7c69d_f7c90549f3cb41868eec805852b201d8.pdf?index=trueIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_b4722d5e8362471db0e1c520b87181ba.pdf?index=trueIn PDF document text
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_f6f1a62b0ba844fbb5d3a965bd95afb9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kosamupim/fedramp_controls_spreadsheet.pdfIn PDF document text
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_e857d39d1f164edd8a0101d9ebd68ee8.pdf?index=trueIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_287f8853915a4368affff26e86db554a.pdf?index=trueIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_af753f96b55a44ee9f05c357ad4ef86c.pdf?index=trueIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_db2c5d47cadd49ceb8addacaae065133.pdf?index=trueIn PDF document text
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_d98dd1ab31594da5b758331a48c4888f.pdf?index=trueIn 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_off0000f85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 5536 bytes
SHA-256: b21e7457b0b5b64ecc2246dd11b23b6e22a529c60c4bfc6ba98dd58120e6a044
font_01_sfnt_off00010b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B08 11436 bytes
SHA-256: 055e44ec66eebf4e31447fa0b2f11783f7121d85245b2e705bb988c553cbc838