Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e6eda40fa8adf9…

MALICIOUS

PDF

77.2 KB Created: 2021-03-16 12:49:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1792e468f36ab31cd8efcda17e29112b SHA-1: 21f23f22d6a7bbf5849e47d0d16974eb00f03f4a SHA-256: e3e6eda40fa8adf98ad3b45ff3b9dda5e4a4037570d6d4bee6ca0b7608eb1cbb
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the PDF structure itself point towards an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://ponafet.ru/award?keyword=carbon+emission+and+climate+change+pdf PDF link annotation
    • https://velupilarase.weebly.com/uploads/1/3/5/3/135341581/19a9805cfe.pdfIn PDF document text
    • http://zootime.store/how_to_stop_kidde_smoke_detector_from_chirping_without_battery9a8dz.pdfIn PDF document text
    • https://kerozuvesiduzam.weebly.com/uploads/1/3/4/3/134375161/venugi.pdfIn PDF document text
    • http://posadukik.getenjoyment.net/investigacion_de_campo_definicion_segun_autores.pdfIn PDF document text
    • http://handler-autoscout24.com/dark_empiret0pfw.pdfIn PDF document text
    • http://voiprormul.xyz/tizelesenamukadezijewozm1lgp.pdfIn PDF document text
    • http://gojovujewinunuj.mygamesonline.org/85200453484.pdfIn PDF document text
    • https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/674113d9b7914.pdfIn PDF document text
    • http://voirlo.xyz/string._format_c_alignmentw3nt0.pdfIn PDF document text
    • https://raputaluwim.weebly.com/uploads/1/3/1/6/131606275/8443740.pdfIn PDF document text
    • https://wajotirege.weebly.com/uploads/1/3/5/3/135306859/fododok-temij.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/is_natural_selection_movie_on_netflix.pdfIn PDF document text
    • https://fenutirixe.weebly.com/uploads/1/3/4/6/134640366/zisuniruxapij.pdfIn PDF document text
    • https://todegebonuvakef.weebly.com/uploads/1/3/1/6/131606144/popebumitexiluv_kapaf_bovexopezi.pdfIn PDF document text
    • http://wersita.space/fopageloqybjq.pdfIn PDF document text
    • https://juxibawazorar.weebly.com/uploads/1/3/3/9/133997202/1212971.pdfIn PDF document text
    • https://dipitamadupod.weebly.com/uploads/1/3/4/8/134882687/2967087.pdfIn PDF document text
    • http://busforpay.online/581832276534e2zt.pdfIn PDF document text
    • http://servempieza.site/5795614130l5bms.pdfIn PDF document text
    • http://verifiedbadges-form.com/firogodozuminukawepavewogban20.pdfIn PDF document text
    • http://markettop.pro/pure_black_wallpaper_hd8crtg.pdfIn PDF document text
    • http://tekplafond.xyz/vurimezufijoxfxjn.pdfIn PDF document text
    • https://talogaxuzule.weebly.com/uploads/1/3/4/5/134596774/7379454.pdfIn PDF document text
    • https://kipigifusulip.weebly.com/uploads/1/3/4/4/134437712/2992487.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nafaradevofipaf.myartsonline.com/20198140361.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_off0000ec08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC08 5612 bytes
SHA-256: 926cc893d9d0cb0acaa58e9d03662ca514f55d267ec44df9045860e137efd3fa
font_01_sfnt_off0000fee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE6 11304 bytes
SHA-256: 7065a2daf988101dc5dcbaed871cc4899e3cbdd535df61e9c4a1588e360dd2e9