Malicious PDF — malware analysis report

Static analysis result for SHA-256 16369978b0184f6f…

MALICIOUS

PDF

46.2 KB Created: 2021-06-03 14:23:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f267743c4643c7c507bb49e77712092f SHA-1: ffe37794c2841928ea06aa1743839cd3cacdacc1 SHA-256: 16369978b0184f6fdb7ed59135e7e532c25f97e5ba55f867a84c7d49b2db4370
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body, though partially garbled, includes a URL that aligns with this finding. The presence of embedded URLs and the nature of the lure suggest an attempt to trick users into visiting a malicious site, likely to download further malware or engage in credential harvesting.

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/how-to-hack-a-minecraft-account-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-robux-on-ipad-no-verification_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/pokemon-go-free-bundle_GM1094591345.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/tiktok-free-music_GM835599320.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-minecraft-for-free_GM479516143.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_off000056e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56E4 26272 bytes
SHA-256: f60785e5fdf7bd8cb39cec2169b272690bbbebd5e75b35d90a40e8799a1ff20e
font_01_sfnt_off00009265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9265 18184 bytes
SHA-256: 9b8f26e31d459421e9e5b83d6a53d579ef5ea49b0db69369fb37c1c5c6cb5db0

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