Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9ab51452437bf2…

MALICIOUS

PDF

45.0 KB Created: 2021-05-13 00:01:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 80917df83e46da28d1cac635614974f3 SHA-1: 4432550393fe4e5767be78133908846ad74a6cba SHA-256: 7e9ab51452437bf2e85806368d551757e5f1815d7e364c7ccb989617515d46ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and the nature of the links indicate a high likelihood of further malicious activity, such as downloading additional payloads or leading to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/free-spins-for-coin-master-game-hack In PDF document text
    • http://www.apocalissedigesucristo.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/add-robux_GM431946152.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://www.apocalissedigesucristo.com/images/roblox-inappropriate-games_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_off00004c3c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C3C 24972 bytes
SHA-256: 869c71e668b0954cc02a2897b7dc6482d3ca3bf3e170d75fcb905144dbcff3e1
font_01_sfnt_off000084fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FA 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAC 17884 bytes
SHA-256: 7a686c540965cac69e1923dfbb6a78ce3f92ec60dbbf6836da21cbb58cd4d6cc

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