Malicious PDF — malware analysis report

Static analysis result for SHA-256 967bf44668e56f27…

MALICIOUS

PDF

49.1 KB Created: 2021-05-11 01:07:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 220ffa9102b4ce3439ee3e16756ed4ea SHA-1: 1f66fcada0f4e5e0c58a75d32a9136739410dbf4 SHA-256: 967bf44668e56f278cc8cba3ecaffe1b30e815e3ec6f84417c89d8fd8fa8c2cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on a 'free Robux generator' or 'game hack'. These links redirect to malicious infrastructure, specifically identified as a redirector. The document body and heuristics strongly indicate a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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/431946152/free-robux-generator-no-human-verification-game-hack In PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/oprewards-com-login_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/download-hack-coin-master_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_off00004d81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D81 29444 bytes
SHA-256: a9190ab915eeb10085a10faad62a3cdf7970d03db64d318de07db6cccf363f5b
font_01_sfnt_off00008f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3A 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE2 18860 bytes
SHA-256: f1337887e63f46ec65b145f76804780e669468724c6330ac6fa0452b843b30d3

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