Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a44ddaca89761c7…

MALICIOUS

PDF

34.3 KB Created: 2021-06-19 02:56:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ab6eac50126777746f782b0573227fe0 SHA-1: a98f8da02f053878d7cbe9313ddb1719d9768f18 SHA-256: 5a44ddaca89761c779807fdd52decccaacff6a60d548c4454d1646e8a889a625
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and other PDF files, masquerading as game hacks and cheats. The document body and heuristics indicate a lure for free game items, likely leading to further malware downloads or phishing. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/roblox-hacks-jaibreak-game-hack In PDF document text
    • http://global-brand.net/userfiles/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-master_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-robux-on-roblox-tablet_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D68 23080 bytes
SHA-256: 9790ad922f05e4e89b0a085ab22bbd16949c899074e03c8ad2e476bf16b9be3b
font_01_sfnt_off0000611d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611D 18944 bytes
SHA-256: 3f48177cc56e1275ca2b39865844e2d763d13c71463c9a2e06b9444c9726978a

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