Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6923bc6cbb29d6…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 13:28:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6d2579db47c560b7c182eab725443ce7 SHA-1: 493394a99aa9b24f6c34a1ec32027bc967e4172b SHA-256: ff6923bc6cbb29d6ac89d14f06caac97a9093c23c32dbf00d25f9212083c73fc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-invite-friends-hack-game-hack, which is part of a network of redirectors. The document body and embedded URLs suggest a social engineering tactic to trick users into downloading potentially unwanted or malicious software.

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/406889139/coin-master-invite-friends-hack-game-hack In PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-2021-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/infinite-moneyz-roblox-injector-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-admin-commands-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-please_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/hacking-on-roblox-c00lkidd_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-hack-download-no-survey_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-demon_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/thanos-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-daily-free-spins-link-today-blogspot_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_off0000302f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302F 22696 bytes
SHA-256: 635eeb31949d48a003e4c448650767c50ca95ed84e43fbf26bfb5e5f3ee77024
font_01_sfnt_off000062d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D7 18456 bytes
SHA-256: a26d5737dc3e5e06b02edf808e6094a365cb44a0ead87865d2f9109774260649

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