Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdfbfab839a5fcc…

MALICIOUS

PDF

32.0 KB Created: 2021-07-24 18:01:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2701fbed158aefd2d9a4e2721db99f2e SHA-1: 5145885d7ad9861cc5721b9b4abe1abc76c024a9 SHA-256: 6bdfbfab839a5fcc418e544d36fbb7a50af511e9e0402b31887c5a1f627df2a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs that redirect to a known malicious domain, likely serving as a lure for game hacks or free currency. The heuristic firings indicate this PDF is designed to redirect users to malicious infrastructure, potentially leading to further exploitation or credential harvesting. While no scripts were explicitly extracted, the nature of the embedded links and the ML classification suggest a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.tw/app/431946152/hacks-roblox-game-hack In PDF document text
    • https://inspiration-modellbau.de/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/coin-master-daily-free-spins-and-coins_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
font_00_sfnt_off00002910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2910 22280 bytes
SHA-256: 0cf13c09a46233e5876ce4a5690b4a8686792c6bb00903cc7bb3a7af01d03004
font_01_sfnt_off00005a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A69 18368 bytes
SHA-256: b8b640b5b196fa252646c462dc29713fca9a534dd8fe06a5ca39aa37add75235