Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94471c6bd5519f8…

MALICIOUS

PDF

96.7 KB Created: 2021-03-28 01:07:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 017a850cf7e9d3f5720ab01b0ba6b136 SHA-1: 24a672c49151f66a49bbd9a009e8fda8825c7c96 SHA-256: f94471c6bd5519f84c8a173cebd06e5ef8943bdf4131bc00cc1da90a0aa30010
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on suspicious domains or use numeric slugs, indicative of a link farm or SEO spamming technique. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=python+for+data+analysis+2nd+edition+o+reilly+pdf PDF link annotation
    • https://cdn.sqhk.co/zuretagugaf/apgc5hf/12744408425.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/1gdhhY1/star_fashion_designer_app.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/1CGDTeS/26822211337.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/jhNhdzk/coleman_catalytic_heater_513_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/dudazume/bQhbjhm/oxford_dictionary_apk_full_version.pdfIn PDF document text
    • http://tudovawo.22web.org/xewofadigi.pdfIn PDF document text
    • https://cdn.sqhk.co/xejexeremiso/Cgih9id/pavuze.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/ZiyIngh/smash_bandits_racing_mod_apk_data_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/xexegapimuwi/g5lmohD/34315961474.pdfIn PDF document text
    • http://solimurelorobiv.iblogger.org/corpus_christi_fishing_report_june_2018.pdfIn PDF document text
    • http://bitawulam.iblogger.org/dieta_cetogenica_cardapio_barato.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/aROhglX/hymns_of_praise_and_thanksgiving_with_lyrics.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/viromibukoleliw/sujet_brevet_2019_maths.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/resumen_de_libro_dejame_que_te_cuente.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/69831545070.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/jarepivanaveb.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/68709406262.pdfIn PDF document text
    • http://viwuleraxukopiz.epizy.com/kixurakukaleduvewavelip.pdfIn PDF document text
    • http://relaweki.rf.gd/dbms_queries_and_answers.pdfIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_b0cfe9a3e40848b095a2c234c2d0170f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/epson_workforce_wf_3640_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/jokulolel.pdfIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_f9442398a0a646dc9195b8d03720a94c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivuxo/best_sheet_material_for_winter.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_off00013a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3B 5364 bytes
SHA-256: 2d7180516fa2a415b095b7f5fe3e2c3bad80a52ed25cd34993fa62d3da119e8b
font_01_sfnt_off00014c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C7E 11892 bytes
SHA-256: 72cd61919f72a8e14a0f399e3fb3449174e9c3ff78cb66f032e59ba662ae4888

Open this report in the interactive analyzer, or submit your own file for analysis.