Malicious PDF — malware analysis report

Static analysis result for SHA-256 20895e05febe8877…

MALICIOUS

PDF

47.4 KB Created: 2021-05-17 20:21:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 504f714330dbf4f68af3d9d49bd07fe2 SHA-1: 45d6c175fb8cceb17e831f7f5867f159b91894ed SHA-256: 20895e05febe88773c8128c9be8fa7583f8eb723f2ff559e14dcb8d6b902dc60
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that lead to known malicious redirectors, specifically targeting users interested in game hacks and generators. The document body, though partially corrupted, contains references to '2021 Roblox' and URLs associated with 'game hack' and 'free robux generator' lures. The presence of these links strongly suggests a phishing or social engineering attack aimed at redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/431946152/2021-roblox-game-hack In PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/roblox-generator_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-roblox-gift-card_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_off000049cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CD 27508 bytes
SHA-256: 77671510586be2c4f8c6d29b7d7eef0ff311458154abb5b735f341c47a4567bb
font_01_sfnt_off0000887a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x887A 6100 bytes
SHA-256: f866077ce59d6ea276f75e4af76daa2aab5f3a1a679df144776123d85664d65c
font_02_sfnt_off00009706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9706 18184 bytes
SHA-256: 056fc97d28377ebe533b38410a286871364a28d37687da14045fa683fef2556f

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