Malicious PDF — malware analysis report

Static analysis result for SHA-256 44722a6755acf1b2…

MALICIOUS

PDF

68.8 KB Created: 2021-03-23 05:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3ff469140606ebc3ea550c272c2722de SHA-1: ae2da91d026fbf7a35d617414e5f9f9045fcddb1 SHA-256: 44722a6755acf1b287a78a29ce1f283a9e1dbbcded152818739a751f3042326e
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing campaign. The PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/award?keyword=adverbs+exercises+for+grade+2+pdf PDF link annotation
    • https://cdn.sqhk.co/pesamelez/MqauFhb/gegafuniwig.pdfIn PDF document text
    • http://lidedapomegila.iblogger.org/26024815544.pdfIn PDF document text
    • http://lejuxetuvi.iblogger.org/convert_string_to_int_java_numberformatexception.pdfIn PDF document text
    • http://naguvogegexaze.22web.org/demonstrative_pronouns_worksheets_grade_2.pdfIn PDF document text
    • http://xebenijafojomef.iblogger.org/juziranubiwajalupolow.pdfIn PDF document text
    • http://gurebenuzasa.iblogger.org/bistro_b_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/zKiGsge/48935724007.pdfIn PDF document text
    • http://dezlice.ru/our_global_environment_a_health_perspective_7th_editioniebaw.pdfIn PDF document text
    • https://cdn.sqhk.co/sudidoxa/dLhcGjf/common_app_counselor_guide.pdfIn PDF document text
    • http://lnstagrambusiness.com/63688599311ifvg2.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/can_a_non_lawyer_represent_you_in_court_in_south_africa.pdfIn PDF document text
    • http://mebel-albero.ru/maserati_granturismo_mc_stradale_costr8r5m.pdfIn PDF document text
    • http://tk-time.site/mushtaq_biochemistry_vol_1x35sh.pdfIn PDF document text
    • https://cdn.sqhk.co/lepagesali/e12jhde/shopping_wishlist_website.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/midjfgg/kemixux.pdfIn PDF document text
    • http://gosunenibunale.getenjoyment.net/xivarasakabevesofix.pdfIn PDF document text
    • http://icub.tech/435790994426ot17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muxolisakij.epizy.com/3d_home_design_software.pdfIn PDF document text
    • http://gujupikisikali.epizy.com/95992084024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7100b106-029e-4647-bbed-09a9ec3835b7/rejujotab.pdfIn PDF document text
    • http://xazulagevam.rf.gd/football_manager_2016_editor_data_download.pdfIn PDF document text
    • http://palelezugob.onlinewebshop.net/xexurijudimakolerumolowez.pdfIn PDF document text
    • http://muduwabu.rf.gd/zajobosiritifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8dbc21a-3dce-46b4-b44f-e61a5139cb6a/how_to_do_crochet_stitches_beginner.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_off0000cd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9D 5680 bytes
SHA-256: add44a7d166053e9d53e1b953212b118b992eb4559de0cf43eb7bf0f25912da4
font_01_sfnt_off0000e112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE112 10596 bytes
SHA-256: 9e2a1df64ed875af1378c992b9f98d24ca4f0a1e0efb027938c8153c386e7b80

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