Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff42b7653a2d65ba…

MALICIOUS

PDF

46.5 KB Created: 2021-05-17 21:13:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6ad1d5ecf10efdd367b4d66d7fc4c79d SHA-1: 5a03d508634facc342d71ec2f4887ffd49c6a7ab SHA-256: ff42b7653a2d65bad7952ec69bfd69609b7f3b4f5e75c539cd72368401583e85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be game hack generators or free currency sites. The primary link redirects to a known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirection workflow, likely intended to lead users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/406889139/coin-master-spins-hack-2021-game-hack In PDF document text
    • http://ohsawamacrobiotics.com/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/free-roblox_GM431946152.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://ohsawamacrobiotics.com/images/roblox-free-robux-generator_GM431946152.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_off00004b17.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B17 29616 bytes
SHA-256: faea21983d110e5fd5bb758f7a5064f32fbb7493b3c00029ce80d9a4c88be418
font_01_sfnt_off00008934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8934 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000092e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92E6 18296 bytes
SHA-256: eaa60ab3b9dbdc46d7aef4d77b4227c1d0aeb4180c3635ae77be6ae4ebf58c24

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