Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f356ddf355bf7ae…

MALICIOUS

PDF

35.4 KB Created: 2021-07-07 23:29:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 91c49806e28903c111a4f3e413f4e9e8 SHA-1: a5837b75122fd6765a2904cba212d9640b884da1 SHA-256: 0f356ddf355bf7aed8c00104fdf5d1556e0a4eb26716678bc3da17d63af12a71
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, including one identified as a malicious redirector, which is designed to lure users into clicking on links related to game hacks and free spins. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially harmful websites. No scripts were extracted from this sample, but the presence of malicious links and the lure suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-2021-game-hack In PDF document text
    • https://mbbs.hr/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/to-cash-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-stolen-account_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-hack-a-roblox-account-using-inspect_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/cheat-qui-dupli-sur-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-change-my-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/hack-roblox-jailbreak-espaol_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/strawberry-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-content-deleted-pants-free_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-cheats-commands_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/1x1x1x1-roblox-id_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
font_00_sfnt_off00003054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3054 23848 bytes
SHA-256: 544fcc1ccd60d4897dd809cc93b59608be99d599fd5b8a3e602c062b6f82f223
font_01_sfnt_off00006694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6694 18576 bytes
SHA-256: a126babb65047b6746617d7d7f27a00b485a4a24246b96e57b4b97a03add53e0

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