Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc611c724236937e…

MALICIOUS

PDF

46.3 KB Created: 2021-05-15 01:01:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7ca1e1b50f5b3070b6c462133938ae34 SHA-1: 0a0b9142bc7f122bb0628ef5b9a32cf0509c5b01 SHA-256: bc611c724236937ee0106dbd6d39a852d85ef087e016a712173301c66de39d58
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and generators. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further malware. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/roblox-hack-site-game-hack In PDF document text
    • https://www.wannon.tw/upload/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.wannon.tw/upload/files/roblox-gift-card-for-free_GM431946152.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_off00004cd6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CD6 30976 bytes
SHA-256: 8bda64daf33cebe9b123775622218dc34c4e060b4280128f9bd0ef91d7c7e37e
font_01_sfnt_off0000928e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928E 18408 bytes
SHA-256: baa68e8b80fe17984eb0f5893287011db8c451c65a8bba41303beeb2aadfa952

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