Malicious PDF — malware analysis report

Static analysis result for SHA-256 1800084f86faaffb…

MALICIOUS

PDF

46.0 KB Created: 2021-06-04 05:08:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2d69fb59cf127997f538bfa8f6d92a25 SHA-1: d77c2fe451a18d3ae475d13e8bb139e49d73afa6 SHA-256: 1800084f86faaffbde762edde68ad8d5377a3fbabfef881d20146739ff7645e7
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a lure for a 'free generator / game hack' which redirects to a malicious URL. It also contains a large number of external PDF links, suggesting a link farm for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

Heuristics 6

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.online/app/479516143/free-minecraft-java-account-game-hack PDF link annotation
    • http://lib.baruna-husada.ac.id//repository/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-tiktok-jelly-fruit_GM835599320.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/free-robux-no-gift-card_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_004_off00004f66.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F66 24800 bytes
SHA-256: a5f31c2d5ef9902001a28baaff46b8a2d02ec67e443d3be71f9d1411c5967df4
font_01_sfnt_off0000874a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x874A 2940 bytes
SHA-256: ae8acc7f13e86db3aed98d7dfb73e70e16f4dedb45e9f0467460b76f54e1a1bb
font_02_sfnt_off00009159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9159 18128 bytes
SHA-256: ad2a0848393495eee102bd1b36be1bc15cd9afc8a8e02692ab65cad6db8d4212

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