Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce4baa9a6669090…

MALICIOUS

PDF

38.8 KB Created: 2021-05-21 18:17:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 89eceb50df2af628ecae7be206fe576a SHA-1: 786e2b397162011cfee71ee08ca02c216d78e19a SHA-256: bce4baa9a66690908236a5d48b27ee998f1c5926cab505eb33bcfc9aa1f3b996
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a visible 'download' button lure, directing users to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves social engineering to trick users into visiting malicious sites, likely to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://netcdn.xyz/app/479516143/free-minecraft-printables-game-hack In PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003438.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3438 24916 bytes
SHA-256: 3e1bba9d4dd13b4f036dcdaca9d6d63511912848c5a6cbe0daab804cebd47f8c
font_01_sfnt_off00006d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D31 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00007741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7741 17956 bytes
SHA-256: e5df45a09fd76c24ea43a7fa28fc5fe559da15feee3d3577044ff876206ae01e

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