Malicious PDF — malware analysis report

Static analysis result for SHA-256 900e9685fb2b74d2…

MALICIOUS

PDF

58.7 KB Created: 2021-06-03 04:54:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ba3b5361bc0bb3107f2decec69baf9c8 SHA-1: 062670766884418cc69ee61234dd04a5c4da97ba SHA-256: 900e9685fb2b74d2221cba93e45b765fa1985b281b850126f663eed1bc76180c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that point to known malicious redirectors, disguised as "free generator" or "game hack" lures. The primary URL, https://netcdn.online/app/406889139/free-coins-and-spins-for-coin-master-game-game-hack, is flagged as malicious. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for malware distribution or phishing. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9585

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.online/app/406889139/free-coins-and-spins-for-coin-master-game-game-hack In PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/pokemon-go-kanto-free-pass_GM1094591345.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/tiktok-free-view-40_GM835599320.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/300-daily-free-spins-coin-master_GM406889139.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005428.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5428 27932 bytes
SHA-256: 7cdcd26048f312915a521b0e359b11ce9c425cbc7020d71072842f31cd52c193
font_01_sfnt_off000094ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94AD 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off00009f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F78 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000b29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB29E 18320 bytes
SHA-256: 2c95db8d02702652075be8f6568e083e0c31fb28563b2fbbcaccc1dd0c48c672
font_04_sfnt_off0000d4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A7 5008 bytes
SHA-256: 2fff596509010811b542e7f19598145f2f86d4c3b91260988a3e19fa3a314b95

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