Malicious PDF — malware analysis report

Static analysis result for SHA-256 672b055135c0b666…

MALICIOUS

PDF

47.2 KB Created: 2021-05-15 02:08:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: afe4462b2971c787c382abfd7f299cb3 SHA-1: aef0f8faf4b6cd60b3c540056e388d07e46f4fbf SHA-256: 672b055135c0b666a49760af87716c61fd19c9a2461f3ef5283da371917dfa65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The primary redirect URL is https://netcdn.xyz/app/406889139/coin-master-free-spins-haktuts-game-hack, which is designed to trick users into clicking through to potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

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/coin-master-free-spins-haktuts-game-hack In PDF document text
    • https://www.alarqam.ae/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/blox-best-robux_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-robux-page_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-com-r_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_off00004d04.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D04 24404 bytes
SHA-256: 87a4be296f582e6c1f929f329ca1e5404d906e998372b7d55e400d995f60563f
font_01_sfnt_off00008483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8483 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off0000969b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x969B 18196 bytes
SHA-256: 60e5d1f6f12937761343702ff54c0624bbba5eb6b748e0cd555839fa9283373b

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