Malicious PDF — malware analysis report

Static analysis result for SHA-256 3965c9ff86978195…

MALICIOUS

PDF

83.9 KB Created: 2021-04-27 21:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 09ea2c610511f7802f06afff07ebdab1 SHA-1: f1bd5f9d014a8ca90aca05e6712d0189cb09e61c SHA-256: 3965c9ff869781957e2cae55395a957266e18abd58e2569cb2f2317d7ed0598a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external links, suggesting a malicious intent to redirect users. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards a malicious document, likely a phishing lure or a link farm for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://xajibur.ru/strik?utm_term=nzxt+h440+fan+hub+manual PDF link annotation
    • https://cdn.sqhk.co/xazururoxe/hhl7cja/nidovowasafakipozofit.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/marketing_information_system_philip_kotler.pdfIn PDF document text
    • http://gonalotuturopil.mywebcommunity.org/best_to_word_converter_online_i_love.pdfIn PDF document text
    • https://jadivamanug.weebly.com/uploads/1/3/4/8/134868371/49877.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabudoxuwa/cggihhc/gamesomibapo.pdfIn PDF document text
    • http://wonizojaru.scienceontheweb.net/3633117749.pdfIn PDF document text
    • http://vozajomaralamer.mygamesonline.org/marcadores_de_aneuploidia.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/16762108916.pdfIn PDF document text
    • https://navemozozaju.weebly.com/uploads/1/3/1/1/131164567/24707ff98e.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/jfgioWS/cut_the_rope_free_apk_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dojonuta/per_aarsleff_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/fetaduretuvigogusuvutuwur.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/how_to_make_a_garden_seat_out_of_pallets.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/da_de_la_cruz_roja_ltimo_sorteo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a5d9ec-dbe4-4713-b84b-582479ef34ca/christian_pre_marriage_counseling_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/photoscape_x_pro_online.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/acordeon_honher_fa_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/difiwaxafolirojemudimokom.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/hive_hub_360_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1930f027-0217-4b8a-b671-6b2ad3a5acf2/ledazagas.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/18169502524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/618edcac-5091-4e3f-a9c7-84560de609ae/zodijes.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/xujowezu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7D 4796 bytes
SHA-256: 66b986f1300df977e1477255a5ff984bb40e92277e89784d44fa955331efd3b8
font_01_sfnt_off00010ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA4 11244 bytes
SHA-256: 029f329142ab712e048656629da60947435171006ac8bdd35fba91afc89daffd
font_02_sfnt_off000132d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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