Malicious PDF — malware analysis report

Static analysis result for SHA-256 089fd34bfb2c095c…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 12:11:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e0a425849868c9c98aeae60f5ca3daab SHA-1: ebfe4622ea7edf58e5a1e52882dd51a3eed8fd11 SHA-256: 089fd34bfb2c095c8b3845042ec9501a92b7c950f0f92be9dfb98c712364b597
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that point to known malicious redirectors, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and heuristics suggest a lure related to game hacks or free in-game currency, aiming to trick users into clicking these malicious links. The presence of multiple redirector links increases the likelihood of a malicious intent, potentially for malware distribution or phishing.

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.online/app/479516143/minecraft-hacked-client-bedrock-game-hack In PDF document text
    • http://oca.undil.tl/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/robux-survey_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/robux-get-com_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_004_off000055e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55E8 25296 bytes
SHA-256: 31e66542a5558a3fddf37a3529dfb5e7eecc47e86f6e729e86691812cb9be5fc
font_01_sfnt_off00008efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFE 18344 bytes
SHA-256: cec5df14c13053b95980c4aea59b0ff00c617a437a79699219b389062a1adae6

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