Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a5dcd048d542903…

MALICIOUS

PDF

41.4 KB Created: 2021-06-14 01:22:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 017e092d7ebeed3096a585c26d823e4b SHA-1: aceb6b1afe66732a43c7d8ec747d547332d1c93b SHA-256: 1a5dcd048d542903ebba10f31d398a309df641aa8a493d2cf6b93bf0f027b77d
160 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to a known malicious infrastructure, specifically advertising game hacks and free spins. The document body, though partially corrupted, contains references to these lures and multiple URLs pointing to similar content. This suggests the primary goal is to lure users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://netcdn.co/app/406889139/coin-master-free-spins-link-blogspot-game-hack In PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-jake-paul-merch-roblox_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-exploit-lua-scripts-cheat-engine-pastebin_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/check-crashed-roblox-hack_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-promo-codes-roblox-2021-robux_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-scripts-hack-dungeon-quest_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-robux-html-adfly_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-russian-sign-roblox-t-shirt_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-draw-2-roblox-hack_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/get-2021-robux-free_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/como-jugar-roblox-free_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-prison-life-hack-mac_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-cheat-exploiter_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-free-catalog-item_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/roblox-kazotsky-kick-script-pastebin-hack_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-get-the-roblox-hack-skript_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/roblox-mm2-hack-script_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/https-wwwrobloxcom-games-2021202196-freeubersummerrewards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004738.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4738 24080 bytes
SHA-256: 0cbb516ad287f431b66c9e65290e4384195cf39dbf4bccb7963c567e0e0c6624
font_01_sfnt_off00007e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4C 18632 bytes
SHA-256: bdbf3986ec68ee3b496ae89412d1d0f392e3b826f1ca321ec58289079c9e4546

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