Malicious PDF — malware analysis report

Static analysis result for SHA-256 87dc2cb953549f4d…

MALICIOUS

PDF

34.1 KB Created: 2021-06-18 07:48:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5fcf5508290d41d238e1b19f97450dda SHA-1: cd227e7151d115ae3688e133d4258e3bd59c9439 SHA-256: 87dc2cb953549f4d1877643ff29de98b739eaf97a7f50267017e63a7fef1f831
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, disguised as "free generators" or "game hacks" for popular online games. The primary lure is "How To Hack People And Get There Robux", directing users to the malicious URL http://netcdn.co/app/431946152/how-to-hack-people-and-get-there-robux-game-hack. This indicates a phishing or scam attempt designed to lead users to potentially harmful content or further malware. No scripts were extracted from this sample.

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.co/app/431946152/how-to-hack-people-and-get-there-robux-game-hack In PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hacking-poeple-in-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-hack-no-survey-or-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/bloxawards-hack-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-game_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-no-sign-in_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-roblox-gfx-artists_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-2021_GM406889139.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_off00002d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D55 22088 bytes
SHA-256: dfae1062696fc5ae96398f741fd5e5ae282a4f7aaa996505992d2e3267d62b32
font_01_sfnt_off00005e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E39 19732 bytes
SHA-256: 6c01a0f95d78929885faffefef44c1f1c5292fe0f7edfefaa5a1d224a7ac30fb

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