Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fb85702b3deed3…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 08:32:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d4a6f86ba5ad701c265c211b0f76449f SHA-1: e2906c5eec2a915d9023348c38ea34663bde11c8 SHA-256: a1fb85702b3deed3c1609ef8f878b1a1e4112cf9aab0a6c4814f51dc242e9ac2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirector infrastructure, specifically targeting users interested in game hacks and free in-game currency. The primary lure URL is https://netcdn.online/app/406889139/apps-to-hack-coin-master-game-hack, which is associated with malicious redirector activity. The document's content and embedded links strongly suggest a phishing or scam campaign designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/apps-to-hack-coin-master-game-hack In PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-robux-script_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/getrobux-ninja_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_off00005058.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5058 24496 bytes
SHA-256: a2fc40129a52175d7952004367127dace58e2813cc9682b0bc56ac7e03a23c59
font_01_sfnt_off00008858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8858 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00009243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9243 17892 bytes
SHA-256: ec9c2c954b0ae415002c25bf965fc53f3e3020b30477345a3b66b9e13b139acf

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