Malicious PDF — malware analysis report

Static analysis result for SHA-256 d703a3fa2f9733f1…

MALICIOUS

PDF

45.8 KB Created: 2021-06-11 13:26:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0ff3f9fe864c7735a4fa4b2e6b41c640 SHA-1: 4bdc804073052db897188512af5ea0d45ff097fd SHA-256: d703a3fa2f9733f11093cde05c4d3e8bd88b9dbbbad493438ef6202426caa849
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The heuristic firings confirm that the PDF links to known malicious redirectors and lures users with game-related content. While no scripts were extracted, the embedded URLs are the primary indicators of malicious activity, likely leading to further compromise or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-hacks-counterbloxrobloxofensibe-game-hack In PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/free-bobux_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/pokemon-go-free-joystick-ios_GM1094591345.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/mistplay-robux_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/free-roblox-followers_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/pubg-30-uc-buy_GM1330123889.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/minecraft-114-download_GM479516143.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_004_off000054e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54E0 25444 bytes
SHA-256: f799a9725c147f46f86c008634f130a9d6aa13f43968e91b7652823e19db5eda
font_01_sfnt_off00008fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDC 18544 bytes
SHA-256: 009a0a0ecf5305e06940b38dffdcf0c1114a5ec5255afd5916c71f308863385e

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