Malicious PDF — malware analysis report

Static analysis result for SHA-256 f712ef3b18940b3d…

MALICIOUS

PDF

47.0 KB Created: 2021-05-14 06:03:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 30648d80f045b6900765904a6de509c7 SHA-1: 47767ccab0960de40a746b21b149dfd24d0fcd25 SHA-256: f712ef3b18940b3d93cc9415bb581236299a217721c0d7058bcdfc18103b47e7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency generators. The primary malicious URL identified is https://netcdn.xyz/app/406889139/500-free-coin-master-spins-game-hack. The document body and embedded links suggest a lure for users seeking in-game advantages, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/406889139/500-free-coin-master-spins-game-hack In PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-handbook_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c27.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C27 27416 bytes
SHA-256: 8db2b2fa30dfcc3e72f30a654078488d95f0025ee8abb2ca2cdb394caeac7422
font_01_sfnt_off00008ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD0 18192 bytes
SHA-256: fa9b97764db53bbdcb5733ef4c9d9cb3d8044f2b2a4eb4797e1cb3a317099c79
font_02_sfnt_off0000ac9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC9F 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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