Malicious PDF — malware analysis report

Static analysis result for SHA-256 290221293b44ecff…

MALICIOUS

PDF

78.5 KB Created: 2021-04-06 15:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: cfec36b1435ed536436d0dbe107ddc14 SHA-1: d02d06119ae47bf1dcf944296c2094fdfc0269a7 SHA-256: 290221293b44ecffa2802f1f0402b64173358d56478a654568c00258ad199e0b
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable domains, suggesting a link farm designed to obscure the ultimate destination. One prominent URL, https://jacksth.ru/strik?utm_term=what+is+the+best+mobile+phone+for+hearing+impaired, is presented in a way that mimics a search result, likely to trick users into clicking. ClamAV and ML classifiers strongly indicate malicious intent, specifically phishing and trojan activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jacksth.ru/strik?utm_term=what+is+the+best+mobile+phone+for+hearing+impaired PDF link annotation
    • http://vataponuxizeliz.mywebcommunity.org/nationalism_and_patriotism_of_filipino.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/62588433055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470679/normal_602a9065b0a08.pdfIn PDF document text
    • http://fimewot.xyz/kumpulan_soal_biologi_smae143m.pdfIn PDF document text
    • http://obmenkalnr.online/javascript_get_absolute_position_of_element_on_pagemuq42.pdfIn PDF document text
    • http://hotloveme.online/what_does_the_bible_say_about_false_teachingi9nv5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466154/normal_60478bc55994f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493916/normal_605dcff87789f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474223/normal_5fe0e2b4aec5b.pdfIn PDF document text
    • http://sifuzifixezija.medianewsonline.com/xutiwuxewadamugusavu.pdfIn PDF document text
    • http://yandex-delivery.cc/fekovapuwakixadifozov96msi.pdfIn PDF document text
    • http://marifivelaj.mygamesonline.org/fundamentals_and_applications_of_nanotechnology.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/algorithms_robert_sedgewick_coursera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_604aca5542419.pdfIn PDF document text
    • http://xoxanuf.mygamesonline.org/labrinth_jealous_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zivonupawidam.atwebpages.com/data_structure_and_algorithm_cheat_sheet.pdfIn PDF document text
    • http://fepusum.onlinewebshop.net/cardiac_muscle_histology.pdfIn PDF document text
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_7bb7f84e1ee64894b8040c207c11ab39.pdf?index=trueIn PDF document text
    • http://xikusaduxofi.atwebpages.com/biotecnologia_vegetal.pdfIn PDF document text
    • http://nozozuwovore.atwebpages.com/how_to_use_a_bushnell_telescope.pdfIn PDF document text
    • http://xizokenimufewom.atwebpages.com/dungeons_and_dragons_basic_set_1983.pdfIn PDF document text
    • http://pudugivifo.myartsonline.com/puxilokinupifi.pdfIn PDF document text
    • https://2df275fc-a8dd-466e-be95-33fe0afe7bed.filesusr.com/ugd/9b6d1e_9197299794e545b2ba2fe09e94d8a8fc.pdf?index=trueIn 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_off0000f3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E0 5608 bytes
SHA-256: caf4024678c10ccbe52191edf30457211bfd1361efd10b6a882935e625a51d10
font_01_sfnt_off000106cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 10996 bytes
SHA-256: 290154215fbf2a99c5e33779ce5f72967f89f4a373b0f89057a7ceb0f86b2336

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