Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8f0830f86765ec…

MALICIOUS

PDF

45.4 KB Created: 2021-05-14 10:15:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 780e7f82e454ed73eb8daa6c18d7847d SHA-1: e3c8ad58b7e5f01dc1600d7655189c44aa9301ed SHA-256: 9a8f0830f86765ec439e06375067a11790b9f7962b46e945e2834b01b412ea1f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest a phishing or scam attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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 https://netcdn.xyz/app/406889139/claim-free-spins-coin-master-game-hack In PDF document text
    • https://dirigentigiustizia.it/images/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/robux-in_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-hack-spins-and-coins-unlimited-free_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
stream_003_off00004a4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4E 25604 bytes
SHA-256: 26bfce6faaf322cec15a885f5f1374362afa23f7bd9fe81cabef3e37cb974497
font_01_sfnt_off000085bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BF 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F71 18220 bytes
SHA-256: a27868aca9095d1db43e3a34661a683bdd93dcaecb4c52cce590f5e85fca806a

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