Malicious PDF — malware analysis report

Static analysis result for SHA-256 757124c5dab416f5…

MALICIOUS

PDF

45.7 KB Created: 2021-05-17 15:42:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 00f2dd23dfa5e000c220074cdb54a7b1 SHA-1: eaf6926275da3f8e6fae390aa7e9fc20fc6ba31a SHA-256: 757124c5dab416f5ac757c3bd1d65da0a6fc27648aefb76d6bdce98ec1d9729c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that appear to be part of a link farm, with the primary URL leading to a 'free generator / game hack' lure. This suggests the document is designed to redirect users to potentially malicious or scam-related content. The presence of numerous external PDF links further supports the SEO link farm heuristic, indicating a coordinated effort to drive traffic to these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/how-to-get-free-robux-easy-on-phone-game-hack In PDF document text
    • http://www.eaapiaria.es/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.eaapiaria.es/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.eaapiaria.es/images/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://www.eaapiaria.es/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eaapiaria.es/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://www.eaapiaria.es/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/robux-in_GM431946152.pdfIn PDF document text
    • http://www.eaapiaria.es/images/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.eaapiaria.es/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.eaapiaria.es/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eaapiaria.es/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.eaapiaria.es/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://www.eaapiaria.es/images/coin-master-heaven-free-daily-spins_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
font_00_sfnt_off000048ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48AE 25640 bytes
SHA-256: 992bfbd8f8b86c98340f2d1133e289fcf995ba05582444c06a611adb8301890f
font_01_sfnt_off000083fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83FB 2908 bytes
SHA-256: e28d2c57f35643e2026f86c34ac3bb63cba74be3f6c066e81aba6d285e5a121b
font_02_sfnt_off00008df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF5 19008 bytes
SHA-256: e6e3347b6ae704c87521381cf50d1046861d1e5efe3155f159bfcc6a29e599dd