Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c935ca773544fce…

MALICIOUS

PDF

79.7 KB Created: 2021-04-15 00:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 61ea14e08a706b662a74034c8f7059aa SHA-1: 64efc1574141024dd145e961d45de972bc5e3a00 SHA-256: 6c935ca773544fce99ac5fac0fc9887ececcb8a71d428741167f0377137730a8
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary malicious URL, 'https://soxebez.ru/strik?utm_term=meraki+mx68+network+security%252Ffirewall+appliance', is likely used to deliver a secondary payload or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://soxebez.ru/strik?utm_term=meraki+mx68+network+security%252Ffirewall+appliance PDF link annotation
    • http://zesabekuziwuga.iblogger.org/greensleeves_sheet_music_voice.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/92159210285nb4oz.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/bowl_games_2020.pdfIn PDF document text
    • http://50offit.pro/79332916209q1pbw.pdfIn PDF document text
    • http://pitetivedu.iblogger.org/punuxas.pdfIn PDF document text
    • http://zazanuxazafukib.22web.org/meliwozugumezenavurareg.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/canon_legria_hf_g30_hd_camcorder1twc9.pdfIn PDF document text
    • http://povisowalikim.scienceontheweb.net/35508123109.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c8cd75-c9fc-4f28-b5c2-4ee789013bc6/65691544782.pdfIn PDF document text
    • http://nasotigide.rf.gd/spelling_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0022269e-814b-49d1-80a9-9fdf396bee46/phonics_assessment_checklist.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/kufofulisasunep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91d14c3c-7a88-4b3f-8db3-85998e3b8940/12155074563.pdfIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/46335468229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a87ad80-eb90-42db-982e-351d293e9a6d/what_is_a_therapeutic_foster_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b83ffbf6-a14c-40c1-805a-b29045abf819/garmin_epix_price.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/ozeri_scale_manual_zk14-s.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/fafanasubododoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b453d4ae-095f-4d31-b6e8-e6d1811b6146/41553082012.pdfIn PDF document text
    • http://jigiwema.epizy.com/editing_marks_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b962c445-f29e-4e43-9933-93a5548b0960/amar_chitra_katha_stories_to_read_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/fedex_printing_costa_mesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1596c4c8-c967-4f57-835a-54184ac4bcd9/are_chromebooks_worth_it.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/gikusokugizok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae28468d-4aa1-4d21-872a-8ee9cec53463/guvexalenulelolazo.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_off0000f7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E2 5876 bytes
SHA-256: f56368326c108baf5a62dd6c45d958b73219fd72b4d6e412c1a73612a2f3927e
font_01_sfnt_off00010c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C07 10804 bytes
SHA-256: 3e74348c6f19a2bf7c5183a4106998886b49bbe0b2238413d001efe0a0c667d4