Malicious PDF — malware analysis report

Static analysis result for SHA-256 9131436ad1c13371…

MALICIOUS

PDF

45.8 KB Created: 2021-05-13 21:11:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9615c4c0c8772e2375345397a373a060 SHA-1: 5c0cdc479c67a30c624e8371b8c2b2ca7aa4e452 SHA-256: 9131436ad1c133715477bae32f33080477178eb2667a7204b411d36dbeeaaae1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/is-there-a-way-to-get-free-robux-game-hack In PDF document text
    • http://bijbelreizenisrael.nl/images/wurst-commands_GM479516143.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/generator-robux_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/getrobux-come_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-coin-master-hacks-no-verification_GM406889139.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_off000048cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CD 26520 bytes
SHA-256: f6d3f84d26acf717e8b5bef548fb33898c2109d4f686dd07f806433728ebab48
font_01_sfnt_off000084c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C2 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E74 18892 bytes
SHA-256: e2ca2daecae93cd27ff1d51a172310d30bada5b25af9f9600d3ad780ee102f76

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