Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d709de76d35612…

MALICIOUS

PDF

48.0 KB Created: 2021-06-09 08:50:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5612950c176c5b543d837c4b710bdcdd SHA-1: 8779a34595aca1b0f8a59c68070336501877496e SHA-256: 07d709de76d356127485b7f4fff57f237a08fb3cd956835083d1398dffe56b07
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it links to malicious redirectors, specifically advertising a 'free generator / game hack'. The document body and embedded URLs reinforce this, pointing to a lure designed to trick users into visiting a malicious site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/how-to-get-free-robux-scratch-game-hack In PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/pubg-uc-in-cheap-price_GM1330123889.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/tiktok-free-unlimited-likes_GM835599320.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/pokemon-go-free-vs-pro_GM1094591345.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/hoiw-to-get-free-robux-on-promotion_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/free-tiktok-followers-and-likes-no-human-verification_GM835599320.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/which-pokemon-go-free-server_GM1094591345.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/rbx-com_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/link-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/free-spin-links-coin-master-2021_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_004_off00005197.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5197 25796 bytes
SHA-256: 65e9554c9adb68d68453078136274148c2c063f7dd7d40a5816408da6e26524f
font_01_sfnt_off00008d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D94 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000977f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x977F 18676 bytes
SHA-256: a59bc053471f1a8e523bdcaf55ec9bd0c5b1934271969220c4615e4ef9552ecb

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