Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a1e19e7e2db791…

MALICIOUS

PDF

48.1 KB Created: 2021-05-11 07:33:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9c0eb294721a55f0cd52eeed4bb787d2 SHA-1: d66aceb7bda8b36b75a682d2d5e1e95cd288d367 SHA-256: f8a1e19e7e2db791a2fdeb601b397adff70fc634b8999a8f87db1310fb21193a
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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 https://netcdn.xyz/app/431946152/free-robux-generator-2021-no-human-verification-or-survey-game-hack PDF link annotation
    • http://slims.abulyatama.ac.id//repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/instantrobux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/www-free-robux-com_GM431946152.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_off00004a7c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7C 26900 bytes
SHA-256: 75d33782a3490dfbaff130f5cfd3c3babf2159d4d703b6bcb25d0befc4d2c806
font_01_sfnt_off00008927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8927 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000095ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95CE 19556 bytes
SHA-256: 76adbda1d3e57e3064df3e292cf485a94c26c1a96e5d3a4e3c484cd1a4e129d0

Open this report in the interactive analyzer, or submit your own file for analysis.