Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9ed56f195c37e1…

MALICIOUS

PDF

70.2 KB Created: 2021-06-12 04:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef56aff64cfa54fa3f2fb98f2ade7371 SHA-1: 8125b074d10f6d7af5fc3ae45f2810b6daa7d43f SHA-256: dc9ed56f195c37e1fcf178e1dd64ab40affa90df13324fee5699412cc5e9c572
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to Weebly-hosted PDF files, indicating a link farm. One of the primary links suggests a lure for downloading Minecraft Java Edition, which is a common tactic for distributing malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/pbw?utm_term=minecraft+java+edition+apk+download+free+android
    • https://fefodenajefive.weebly.com/uploads/1/3/1/4/131437461/mogilenukidodu.pdf
    • https://razagitipiz.weebly.com/uploads/1/3/4/5/134521267/1303ac56433.pdf
    • https://teseresoj.weebly.com/uploads/1/3/4/6/134644138/0b822256.pdf
    • https://desalipi.weebly.com/uploads/1/3/2/6/132681317/retifoputifope_tewoxep.pdf
    • https://static.s123-cdn-static.com/uploads/4447669/normal_5ff9eef3107a2.pdf
    • https://static.s123-cdn-static.com/uploads/4502439/normal_5ff757aaaf952.pdf
    • https://static.s123-cdn-static.com/uploads/4464862/normal_5fdf5ea3a0c87.pdf
    • https://cdn-cms.f-static.net/uploads/4383802/normal_606e00b76db2d.pdf
    • https://cdn-cms.f-static.net/uploads/4414339/normal_601745bdd2197.pdf
    • https://dituwugo.weebly.com/uploads/1/3/4/2/134235792/e2c269f76907d0.pdf
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/vevawupatazazit.pdf
    • https://cdn-cms.f-static.net/uploads/4421782/normal_605dc8e4d0b21.pdf
    • https://static.s123-cdn-static.com/uploads/4494866/normal_5fc62ec33bd39.pdf
    • https://vojoritus.weebly.com/uploads/1/3/1/1/131164067/mefage_polopatitow_kimamanu.pdf
    • https://static.s123-cdn-static-d.com/uploads/4369327/normal_60b54cb451ef4.pdf
    • https://tiruzezisuwef.weebly.com/uploads/1/3/4/4/134499189/139d14e0479.pdf
    • https://cdn-cms.f-static.net/uploads/4368958/normal_604acfad0af78.pdf
    • https://nenopejir.weebly.com/uploads/1/3/4/6/134603535/rivozifagew.pdf
    • https://cdn-cms.f-static.net/uploads/4413696/normal_60394ac369d26.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000d2e9.bin
a3f72dd5fcb980bf785304020ab56a3fce73d3dca19f6ebaf32f4bace98a4fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E9 5268 bytes
font_01_sfnt_off0000e513.bin
fdda3dd0d72cc8d70a09e7108e369265bb8693f50e3dc820425e6c17fbfc741d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE513 11972 bytes

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