Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8483041340f57fa…

MALICIOUS

PDF

87.9 KB Created: 2021-03-02 07:47:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e50fee6fad2ab4285c6882d86f0d76c9 SHA-1: 749f7303d11b1c1a60d48292ad9b4f2438de664b SHA-256: c8483041340f57fa94fcb394016d8384f0175f3e70ad1062901ff09e2353de80
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF document exhibits characteristics of a phishing lure, specifically targeting multi-factor authentication (MFA) or recovery secrets. The presence of numerous external links, many pointing to Weebly-hosted PDFs, suggests a link farm designed to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, aligning with credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/wix?keyword=security+architecture+and+design
    • https://sixusiwof.weebly.com/uploads/1/3/1/4/131454093/4355674.pdf
    • https://norakefepasuki.weebly.com/uploads/1/3/1/3/131382134/balupoben.pdf
    • http://usene.xyz/2013_taotao_50cc_scooter_parts24ciq.pdf
    • http://ionatr.fun/express_the_graph_of_solution_set_into_interval_notation_brainlytgmwh.pdf
    • https://mitewowepo.weebly.com/uploads/1/3/0/8/130813710/f3afb7a31aa72c.pdf
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/1167679.pdf
    • https://letavozogat.weebly.com/uploads/1/3/5/9/135978758/wukorimurusamus-najuj-vonewosubibi.pdf
    • https://nawolokiwepona.weebly.com/uploads/1/3/2/8/132814855/nivesiw.pdf
    • https://furizakifoji.weebly.com/uploads/1/3/4/4/134446406/8295815.pdf
    • http://mmamba.ru/bamboohr_performance_management_costerif8.pdf
    • https://vumirexow.weebly.com/uploads/1/3/2/7/132740730/6425417.pdf
    • https://xejukosaxup.weebly.com/uploads/1/3/1/4/131437924/5840991.pdf
    • http://vinnipoh.fun/shab_e_barat_mein_nafil_namaz_padhne_ka_tarika92je0.pdf
    • https://nofuzibid.weebly.com/uploads/1/3/1/4/131453406/ganoja_xanilisotewi_guwezufizal_borufesutamaw.pdf
    • https://rokegijigu.weebly.com/uploads/1/3/5/9/135978077/gosazudab_lusaveraxiro_guwilokuzabagur_fepisa.pdf
    • http://afracheat2.xyz/vexaduxufetozuf7bqx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/povelenavuviw/joxovakigowenegejik.pdf
    • https://s3.amazonaws.com/remavuj/sozixiniwakonefafaz.pdf
    • https://s3.amazonaws.com/sulasatevirexo/sufogu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119e5.bin
f998c6e199b67d262b7e099a12261263c623e6b4475760270c9ba2a097b0de91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119E5 5376 bytes
font_01_sfnt_off00012c2a.bin
30dea333c6730f69b113ec63b153902c285d29e0a9259b5ce60d82ad5adb2732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2A 11192 bytes

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