Malicious PDF — malware analysis report

Static analysis result for SHA-256 de93f7436c183213…

MALICIOUS

PDF

52.3 KB Created: 2021-05-15 23:04:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 47b6f419aed69bacee10f990659dc418 SHA-1: e646b988b6bc0b1a6da58ce7d0391dcc0f4608d3 SHA-256: de93f7436c1832139c8a641fad234aa9dbe42c2a86ed843e1aaa5b7c9be3bf9c
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 what appears to be a "game hack" or "free spins" generator. These links redirect to malicious infrastructure, specifically `https://netcdn.xyz/app/406889139/google-play-coin-master-free-spins-game-hack`, which is flagged as a known malicious redirector. The document's content and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8646

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/google-play-coin-master-free-spins-game-hack In PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/2021-roblox_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/is-coin-master-free_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c88.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C88 27524 bytes
SHA-256: dab3e40781e69a95854883f49b49d5e9983121915496b896679aec9110e13924
font_01_sfnt_off00008afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFB 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off000094dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94DC 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off0000a967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA967 18580 bytes
SHA-256: 159b8c9b1a2eefbbab3f5eb8e11562dfe96c3187e7709bb0bd16e4420bc442bb

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