Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b924ac90db3504e…

MALICIOUS

PDF

75.6 KB Created: 2021-03-16 04:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 49aeb1b1cbb374ac722576da2f34a878 SHA-1: 919a3fecd268295deeec8d25bb74e718e762dbb6 SHA-256: 9b924ac90db3504e7421777c30aa3a2559251e5f8061355c53fb9eec66eaf293
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=apache+tomcat+7++64+bit PDF link annotation
    • http://sexedate69.site/naxizanalobanixupdvxv.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/accounting_terms_in_spanisheay4u.pdfIn PDF document text
    • http://com-servers.online/baahubali_telugu_hd_mp4_video_songs2vmev.pdfIn PDF document text
    • https://jalusuduzewot.weebly.com/uploads/1/3/1/4/131456012/5404191.pdfIn PDF document text
    • http://rusadezebep.mygamesonline.org/bacteriological_incubator_sop.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/what_causes_increased_parathyroid_hormone.pdfIn PDF document text
    • http://dvestideyli.xyz/lunutedihcde1.pdfIn PDF document text
    • http://gidujoluj.mypressonline.com/bifomajagapi.pdfIn PDF document text
    • http://reduslim-shopofficial.site/topps_uefa_champions_league_chrome_checklistfjs23.pdfIn PDF document text
    • http://gakukuketisalum.scienceontheweb.net/arihant_maths_books_for_iit_jee_free_download.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/zadog.pdfIn PDF document text
    • https://vumirexow.weebly.com/uploads/1/3/2/7/132740730/nupolezosimox_xerokiko_talavudilota.pdfIn PDF document text
    • http://flymoney.net/movistar_play_gratis_argentinaj17qf.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/kanesudusiwarejimefe.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/behaviour_management_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejesezape.myartsonline.com/universidad_del_tolima_programas_de_pregrado.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/arcgis_10._5_eitim_kitab.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/zondervan_bible_dictionary.pdfIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_d5da865abf594671905839c7527d8124.pdf?index=trueIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_01dbfb1ae89d42e2bbc8f4c7b3bf117e.pdf?index=trueIn PDF document text
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_6afa12450e8c4e528c2e961dd6770692.pdf?index=trueIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_6626e7adb05e47b5b7ab2ae2d19869e7.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_off0000e8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C0 5316 bytes
SHA-256: 265a76d0f77594c24290c245962c51fea91b0c6222465da859bf93cdef8847f7
font_01_sfnt_off0000fabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABE 11436 bytes
SHA-256: f8fff643f763acfaa02e8f9cf26e700ebc312468df0f5e7fdfed3c9b1ca32cdc