Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf992ec0bb65510…

MALICIOUS

PDF

44.5 KB Created: 2021-05-11 18:33:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b5e22e74397af7331d13348ae9d78996 SHA-1: 0f3495c9c7f58d711fe87202dca7db20b56ff027 SHA-256: 2cf992ec0bb6551074ae8c3691e542ccbea3f34e5930ae1ced8dbd8387ce837b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector pointing to 'https://netcdn.xyz/app/431946152/games-to-get-free-robux-game-hack'. This lure, combined with heuristics indicating a game hack or free generator theme, strongly suggests a social engineering attack. The document likely aims to trick users into visiting the malicious URL, which could lead to credential harvesting or further malware delivery.

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 https://netcdn.xyz/app/431946152/games-to-get-free-robux-game-hack In PDF document text
    • https://gimnaziya6.kz/images/roblox-verification_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • https://gimnaziya6.kz/images/robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master--hack_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/roblox-imagine_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-free-stuff-links_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_off00004b26.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B26 27240 bytes
SHA-256: 23a99c6a3174322aa2847f78f1b4dd9fc9e934b7ac3249ea60c1a16ffea0bcf9
font_01_sfnt_off00008aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA0 18608 bytes
SHA-256: 08e91301afb793f0c8f569168ad93911c90315771ef2b58170e32493949df7cc

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