Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa45a8b35fdb956…

MALICIOUS

PDF

46.4 KB Created: 2021-05-18 04:06:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 11dcf6cad388bc404ba5fc64bbea241b SHA-1: 9b36b661c10e7346807f6a54821169aa449838f6 SHA-256: ffa45a8b35fdb956e4b5b337f7e0fae41f2a58bac47e8f19b2eb775ef4deda5b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as 'free generator' or 'game hack' lures. The primary link, https://netcdn.xyz/app/431946152/free-robux-kid-friendly-game-hack, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to similar lures, reinforcing the phishing and potential malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/free-robux-kid-friendly-game-hack In PDF document text
    • http://androidthai.in.th/images/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://androidthai.in.th/images/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a45.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A45 26532 bytes
SHA-256: 04fdb1071efa6ddf9936a992aaa564b0b30cffdd657ae2d4adeb7c128105c197
font_01_sfnt_off00008599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8599 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9240 18560 bytes
SHA-256: 454f7722b5e362ebb3dfaacf6303323d9fe80b0a3b091af17d82283aff73172d

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