Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf408d24aadc50e1…

MALICIOUS

PDF

98.8 KB Created: 2021-06-11 01:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2d35dc86483686e7f04b0a8457ffea91 SHA-1: 0b1c23f25a82bf5c733ded1da92676d6c939c00a SHA-256: cf408d24aadc50e115aa0aca037b7e2f63dc351af998cd5574eb37eea7e2b040
194 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and numerous external links point towards a tactic of luring users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/pbw?utm_term=how+to+spawn+a+mansion+in+minecraft+with+a+command+block PDF link annotation
    • https://rujivedudupuvi.weebly.com/uploads/1/3/6/0/136051492/vumuke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_604eef2e0a464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_606068c33279b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444853/normal_5ff016458d958.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/xikiwuwiditilip_zidevakutenuv_rewuwidisamaje.pdfIn PDF document text
    • https://tosufiriro.weebly.com/uploads/1/3/4/4/134472590/39d726fbee818.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447885/normal_5fecc6be28131.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489732/normal_5fe22174e354d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483839/normal_6044d62adaba6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458431/normal_5feb31f5216bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529977/normal_5fd90eac0c7a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_605d7b4774bee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446272/normal_601efa85e945c.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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
    • http://luwolozibiva.pbworks.com/w/file/fetch/144991275/sikelowerubon.pdfIn PDF document text
    • http://fuzugimife.pbworks.com/f/voicy_phone_mod_apk.pdfIn PDF document text
    • http://wepoline.pbworks.com/w/file/fetch/144678591/fique_rico_ou_morra_tentando_filme_completo_online.pdfIn PDF document text
    • http://zemilenasi.pbworks.com/f/ejemplos_de_variables_independientes_en_un_experimento.pdfIn PDF document text
    • http://sokulus.pbworks.com/f/mapamundi_con_nombres_blanco_y_negro_hd.pdfIn PDF document text
    • http://movovepavuzi.pbworks.com/f/31747814652.pdfIn PDF document text
    • http://werinenimuta.pbworks.com/w/file/fetch/144518262/comment_enlever_le_flou_de_la_page_d_accueil_windows_10.pdfIn PDF document text
    • http://bipuwetek.pbworks.com/f/the_conjuring_full_movie_in_english_download.pdfIn PDF document text
    • http://masigali.pbworks.com/f/kijemakimalovaruwaso.pdfIn PDF document text
    • http://xuwedateredu.pbworks.com/w/file/fetch/144593112/how_to_get_answers_from_edgenuity.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/sepujoxedazaferurituwogov.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C61 1964 bytes
SHA-256: 5e9ba3763f24d163a34e94e40357e3f0172992776c239fc3f550a4cf0f319d63
font_01_sfnt_off0001356e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356E 5440 bytes
SHA-256: b264548a84e884700ffe5d3de1bdba558e23c8b9434439053006123e94c3b1e4
font_02_sfnt_off000147c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C1 11208 bytes
SHA-256: 5ea148c0980f2d96c65bae78e277e866d1799c3e39590ab5b5aef03ea24885be
font_03_sfnt_off00016e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E2C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361