Malicious PDF — malware analysis report

Static analysis result for SHA-256 8272d2c5abcfe924…

MALICIOUS

PDF

33.8 KB Created: 2021-06-19 00:37:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cf6d6ade276dc2f63c70e7bb415ec6d8 SHA-1: 20ba2506baf9d80ebb8d4bbb731bdc93e24d69e2 SHA-256: 8272d2c5abcfe924983286456c37ca45777055e093891f96a96668bf9b3ac796
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as game hacks and generators. The primary lure is "How To Get Free Robux On Roblox Website", directing users to http://netcdn.co/app/431946152/how-to-get-free-robux-on-roblox-website-game-hack. This indicates a phishing or scam attempt to redirect users to potentially malicious sites. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a 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/how-to-get-free-robux-on-roblox-website-game-hack In PDF document text
    • https://au-ma.com/image/data/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • https://au-ma.com/image/data/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-hack-on-any-game-on-roblox_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/furk-se-free-key-roblox_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/pokemon-go-free-incubator_GM1094591345.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-link-in-description_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-spins-moonactive_GM406889139.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_off00002daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAA 22168 bytes
SHA-256: c4661a4e7903f485547017df501723422de1fb02559c0169945a0fa26737ff39
font_01_sfnt_off00005e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2A 19376 bytes
SHA-256: 33a7a1c523ec718187f43daba93bda17ea914145d14a015abd435ac1ed3554df

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