Malicious PDF — malware analysis report

Static analysis result for SHA-256 d817bf4a8aea4140…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 12:45:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 835e2204abf9e311e49b9be1c6512744 SHA-1: 7ce7119ac12b3ccb07073d88240bdfaa53e0c65d SHA-256: d817bf4a8aea4140119f0f5bf790aee793ba1581b369d3aef868c797f2bcabb5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The document body and heuristics indicate a lure to download or access potentially unwanted or malicious content. No scripts were extracted, but the presence of malicious redirectors and the lure suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/479516143/aristois-minecraft-hack-game-hack In PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/hack-menu-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/fnaf-roblox-free-items_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-100-robux-gift-card-codes-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-trello-gold-roblox_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/e-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/roblox-bot-free_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/roblox-how-to-get-free-clothes-no-bc_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-hack-people-on-roblox-without-downlaods_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-obby-limited-time-only-2021_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/simplysarc_GM479516143.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-working-roblox-robux-codes_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-hack-coin-master_GM406889139.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
font_00_sfnt_off000033a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A7 22676 bytes
SHA-256: b153c80a6b75e28e7e1c669d7efa5be7358f05ba44c20cde2c92fd0b3678260b
font_01_sfnt_off00006675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6675 18168 bytes
SHA-256: 271777a136a6f3efdfa034c086a74476d42872276a2731bd80599829abd26f21

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