Malicious PDF — malware analysis report

Static analysis result for SHA-256 000c24644baf5095…

MALICIOUS

PDF

111.1 KB Created: 2021-03-29 01:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7caa1bbf095111bd3bb28874f8da1e4 SHA-1: b93477e211de971ce91e7bc3566394cd03a13ffe SHA-256: 000c24644baf50954e908db532842ff0e6a3b0426325484288fb395b31d2e6de
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a significant number of external links, many of which are part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, with the first being 'https://uploads.strikinglycdn.com/files/ea9628ed-489d-48dd-b3b9-2508194f437c/newiva.pdf'. Additionally, an external URI 'https://botokaw.ru/wix?keyword=e0+b8+aaa' was found. These elements suggest the document is designed to redirect users to potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://botokaw.ru/wix?keyword=e0+b8+aaa
    • https://cdn.sqhk.co/tavevalurov/YPjeSus/59495032740.pdf
    • https://cdn.sqhk.co/banuluwopote/gcCXjes/bagaladunemifisaj.pdf
    • https://cdn.sqhk.co/kokademesuz/DhbntT4/skylanders_ring_of_heroes_update.pdf
    • https://cdn.sqhk.co/murajefovel/hiVvic0/cut_grass_when_wet_or_dry.pdf
    • https://cdn.sqhk.co/noxomosanena/3ibjcmo/business_management_chapter_14_quizlet.pdf
    • https://cdn.sqhk.co/pexejaxer/ZQ7ihbB/58291815094.pdf
    • https://cdn.sqhk.co/kagalitisup/cQGNgQ9/3432488653.pdf
    • https://cdn.sqhk.co/budajawisore/hbjdHMC/lurekifalirimonalib.pdf
    • https://cdn.sqhk.co/woferomot/2hjjcgh/jerafinabolubabuwa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ea9628ed-489d-48dd-b3b9-2508194f437c/newiva.pdf
    • https://uploads.strikinglycdn.com/files/168b0922-5d70-43d5-9726-c02f84696bc9/vojoj.pdf
    • https://s3.amazonaws.com/wiwamoxamo/learn_how_to_do_stock_options.pdf
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_92b5c96fed364f38b1e042225f8c44fd.pdf?index=true
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_6c77d46a1f794602bfb0254eb2128887.pdf?index=true
    • https://s3.amazonaws.com/wexoteluwag/37742777183.pdf
    • https://uploads.strikinglycdn.com/files/00cec8f7-e634-4c3c-b420-5aef4b8c61a8/wufiparoxoxobo.pdf
    • https://s3.amazonaws.com/kofabube/702386571.pdf
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_8770fd9d0e254898bfb781253b7ed912.pdf?index=true
    • 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_off00017a74.bin
1febb1922acd0bf7d173191b83916157a8e5cee9109417418970cdab71046146		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17A74 4808 bytes
font_01_sfnt_off00018ae2.bin
6bed41d136764258fc858ce01b7f75c880bdcec0571ca184e355c02f77e7b8f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18AE2 11264 bytes

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