Malicious PDF — malware analysis report

Static analysis result for SHA-256 51eda116b8b6624a…

MALICIOUS

PDF

73.1 KB Created: 2021-02-26 05:23:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6b2ebff9870bd1885b96ad178b316581 SHA-1: fbcce0bdcad81ac22818709b469bfa3f4212b445 SHA-256: 51eda116b8b6624a9330d9f749985ce3117cfdb4ff46b2280faea86e1b60991d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://druttle.ru/award?keyword=integers+word+problems+worksheet+grade+6 PDF link annotation
    • https://bekefipupo.weebly.com/uploads/1/3/4/0/134096026/38faf9a5bbf17a.pdfIn PDF document text
    • https://gefozusep.weebly.com/uploads/1/3/5/3/135346228/muxasag-dugipuzexijuret-velamoretav.pdfIn PDF document text
    • http://detonic-italia.website/8884051227326g0l.pdfIn PDF document text
    • https://pigixona.weebly.com/uploads/1/3/5/9/135986477/benedegafakumot.pdfIn PDF document text
    • http://afracheat9.xyz/70856759429ajekr.pdfIn PDF document text
    • http://sfr-webmail.com/394139706360r2c1.pdfIn PDF document text
    • https://vokavubibobudew.weebly.com/uploads/1/3/5/3/135316357/59c27cbc97b.pdfIn PDF document text
    • https://wujojebexubab.weebly.com/uploads/1/3/1/3/131380870/d93d6837d25.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/295f9a.pdfIn PDF document text
    • http://unityfree.xyz/problemas_de_areas_y_perimetros_paraqcos5.pdfIn PDF document text
    • https://fogofude.weebly.com/uploads/1/3/4/3/134322730/2506583.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://novozozoto.epizy.com/ruxodumijedupexasil.pdfIn PDF document text
    • http://zefabuvo.rf.gd/61594994183.pdfIn PDF document text
    • http://kepijemimubu.rf.gd/jamukufos.pdfIn PDF document text
    • http://fipuxogililego.epizy.com/twitter_apk_2019.pdfIn PDF document text
    • http://mapodivopabo.rf.gd/antivirus_software_quick_heal_free.pdfIn PDF document text
    • http://wimidisa.epizy.com/google_sheet_meeting_agenda_template.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_off0000dfa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA1 5760 bytes
SHA-256: 338296370dc6f13685ea647f27720519c3bb79484174aea8a6b588b7bc7a733a
font_01_sfnt_off0000f318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF318 10612 bytes
SHA-256: a01bf7fba5e30900e68b0224ef5fc4a93470f9a9c68abc0c847659bc2f54ee5c