Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a07c3211d714ba…

MALICIOUS

PDF

46.7 KB Created: 2021-06-08 14:00:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf9039eb3b8dc2c685785d289826555a SHA-1: 75d62082b350007ad2b3236e91f5533ef0e61966 SHA-256: 15a07c3211d714bab43414ff01cbcf92dd266e693421a8353f5ca0f0b5e4fe8f
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a malicious redirector disguised as a "free generator / game hack" for Roblox. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. Although no scripts were directly extracted, the malformed stream and ML classification indicate malicious intent, likely to facilitate further compromise or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9810

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/free-roblox-promo-codes-2021-may-14-game-hack In PDF document text
    • http://elitesoftsolutions.com/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-real-hack-robux-real-encrypted_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/daily-free-spin-coin-master-link_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_004_off00004e70.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E70 24176 bytes
SHA-256: 6951741ec628feed60051cffa5dc0eb02a0409c2c177caeb67c6ae82710e6335
font_01_sfnt_off0000860c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860C 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBD 19604 bytes
SHA-256: bee877d55e02b6ec5556f1f8e48267b77dd610c118de33b888af21659e757f1b

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