Malicious PDF — malware analysis report

Static analysis result for SHA-256 198fa50037c8c074…

MALICIOUS

PDF

45.8 KB Created: 2021-06-07 10:36:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 21244bbdd74724995738bc1544f63c0f SHA-1: 47cc36274d04b5c5b4cf5a756f792cd929d762c2 SHA-256: 198fa50037c8c074494f34364a7e1e346710f8b62544c49eae6f07af6cd02c62
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, disguised as 'game hacks' for Roblox. The document body and embedded URLs strongly suggest a phishing or scam attempt, aiming to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used for redirection or exploitation, hence the T1059.007 technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-hack-in-to-builder-mans-acount-roblox-game-hack In PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-robux-hack-tool_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/safe-free-robux-no-password-or-human-verification_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-system32-host-hack_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/anti-ban-and-kick-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-roblox-gift-card-2021-live_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-hack-a-roblox-account-2021-easy_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-gems-roblox_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/pison-club-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/nopde-engine-64-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/invisible-hack-roblox_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/client-hack-roblox-2021-download_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-free-robux-generator-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/hack-roblox-using-command-prompt_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-fly-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-get-youtube-robux-hack_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/guuudinforoblox-online-hack-for-free-robux-and-builders-club_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/hacked-roblox-face-id_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-get-free-tix-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-hack-the-streets_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005548.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5548 24748 bytes
SHA-256: b3fdb7e7f7e15b5bb62e900fc8ecc9bb675ad2a699e50860efc1045294039899
font_01_sfnt_off00008dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEE 19080 bytes
SHA-256: 492f9a415855a22c7514f2e330777cfaac9735836f7e41eb2db9c696ac869eab

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