Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc45970ab6014a8c…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 03:38:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 245db30add42e0c970ab43a6ce116011 SHA-1: aa0fb0786caa8a1fe7e30417bd50778f1f69e134 SHA-256: fc45970ab6014a8cd750f0070a6d503080910c587f5e735406dc32c8c9e6e752
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains multiple external links, including one to a 'game hack' generator, and exhibits characteristics of a PDF link farm. The document body and heuristics indicate a lure for game-related cheats, likely to drive traffic to these external sites. The primary purpose appears to be SEO manipulation or acting as a gateway to other malicious or scam-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/how-to-get-free-daily-spins-on-coin-master-game-hack PDF link annotation
    • http://www.salwangurgaon.com/files/hack-mui-dragon-ball-n-roblox_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/roblox-adopt-me-free-pets_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_002_off000031fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31FA 23420 bytes
SHA-256: d4a7d8ae1129916bb05f38feb455fb8fcc156008aa5be5e83fde9a4723722894
font_01_sfnt_off000066d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D6 18760 bytes
SHA-256: 89720f8e989fc755865bb58a4df1992efb06386137a1e51c42106f51fa5b6feb

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