Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a23ca78cf5a5a01…

MALICIOUS

PDF

43.3 KB Created: 2021-05-10 17:22:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2bfd7504f125631f98ad9d78a0c909ae SHA-1: 3c5c2a3072d1d53b042e91c99bfa16d09f7a722a SHA-256: 2a23ca78cf5a5a016ce01aae389e137f3eec10f8cb3676c10bcb0aad177a63ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector URL that promises game hacks and currency, indicating a phishing or scam lure. The embedded URL is known to be associated with malicious redirector infrastructure. Although no scripts were extracted, the document's structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/robux-generator-no-human-verification-or-survey-game-hack In PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-18_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-free-spins-cash_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
stream_003_off000049f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F8 25344 bytes
SHA-256: 28e6d2d93663e9a6679abb005d33fb6547951ec380368f7db7514e0c1b773734
font_01_sfnt_off000084d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D5 18988 bytes
SHA-256: fd03835d47fc92fdbc833168bdcaa48cf4fd012cdc930f071d53792c02192192

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