Malicious PDF — malware analysis report

Static analysis result for SHA-256 d898bbbbb5ed1f4d…

MALICIOUS

PDF

135.2 KB Created: 2021-04-05 08:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3cc2d0119f2fafbae1ddfb07e49135dd SHA-1: 41191e85a70799c063c587dff522d68daf85430c SHA-256: d898bbbbb5ed1f4db55cb71539774acfaecbb30e329a0b453e194ba5b35c67d7
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to water softeners, suggesting a phishing or social engineering attack. The presence of embedded URLs points to an attempt to redirect the user to a malicious site, likely to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9630

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=best+water+softener+salt+for+iron+removal PDF link annotation
    • http://saripituxupagek.sportsontheweb.net/siwefidoruzigepuvemul.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/30623745929.pdfIn PDF document text
    • http://kimiter.medianewsonline.com/how_to_flush_a_navien_tankless_water_heater.pdfIn PDF document text
    • http://aarbuz.space/yzr7j.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/catering_menu_card.pdfIn PDF document text
    • http://lumogodasekepi.mypressonline.com/ielts_academic_reading_sample_questions_and_answers.pdfIn PDF document text
    • http://betmoy56.com/feasibility_analysis_matrix_templatep5g1f.pdfIn PDF document text
    • http://durebemidiges.getenjoyment.net/5703608418.pdfIn PDF document text
    • http://giwewigipebi.medianewsonline.com/lewali.pdfIn PDF document text
    • http://mrshadow.net/tugopewenepu0h.pdfIn PDF document text
    • http://kulinar2020.site/las_cronicas_de_narnia_el_principe_caspian_onlinets3k2.pdfIn PDF document text
    • http://helplnstagramoffice.com/sexuwadojivirusiba8v2jm.pdfIn PDF document text
    • http://sugalomiwuto.getenjoyment.net/gekefajuwurimofex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/30462732075.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/dell_latitude_e7450_drivers_windows_8.1_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/chatrapathi_telugu_movie_songs_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/dokigowaxeluzi.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/barbados_immigration_passport_form_b.pdfIn PDF document text
    • http://sewujajapivix.onlinewebshop.net/calligraphy_books.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/free_audiobook_apps_for_android_phones.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/no_nonsense_decorators_caulk_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/posawizuliwa.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18836 6956 bytes
SHA-256: dbc8c6ba572e558754f0597a55d8120d77fedd22685180189f198aa079e1175a
font_01_sfnt_off000199ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199EA 5116 bytes
SHA-256: 5c2382bb9f0e343de868c3de224f742d409727552b2c823bf0c1e855e7b34b07
font_02_sfnt_off0001ab4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB4B 6960 bytes
SHA-256: 1e6921a18eff2d7a33a73345dba622f9f81b8498436fb53cb92413f3101f62ed
font_03_sfnt_off0001c344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C344 13280 bytes
SHA-256: 1ed0bba71594ae7111b0a7b1123777d7b244f26ce9f075ed468b5e2b3cf35508
font_04_sfnt_off0001ee7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE7E 16628 bytes
SHA-256: f4171acc0a65b91c8fe672236d7f7e9a4e0925627c17e91fdfadd4430153be8e
font_05_sfnt_off00020559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20559 1736 bytes
SHA-256: 1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19

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