Malicious PDF — malware analysis report

Static analysis result for SHA-256 6603aa79dc730ddc…

MALICIOUS

PDF

46.6 KB Created: 2021-05-15 12:31:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1648dd41343b4792be148b4f74f28940 SHA-1: e13bd7b719d6aa61348e58c440f633c9b9c7c0d8 SHA-256: 6603aa79dc730ddc2436db060762bdbb9b82ede7cd30669373c11e478cf8edc3
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, including a known malicious redirector at `https://netcdn.xyz/app/431946152/roblox-hacking-website-game-hack`. The document body and heuristics indicate a lure for game-related cheats and currency, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the links point towards a malicious redirector chain, likely intended to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-hacking-website-game-hack In PDF document text
    • http://gods-own.org/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004887.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4887 27492 bytes
SHA-256: e25d45940f0af6a1ce100effe165d8cd87f74af231232d05de007f198dbb834b
font_01_sfnt_off00008799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8799 2912 bytes
SHA-256: 888750e3dd3806a51f7983862055752b8701ec80ed8e02dd50d99d977971692c
font_02_sfnt_off000091a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A3 18892 bytes
SHA-256: e7d47ce6402ad6c34a9dd837b4455ddf5104770abd157e72eb2d384f2e13ef46

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