Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd07c2b78ff01f96…

MALICIOUS

PDF

47.8 KB Created: 2021-05-13 15:03:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2d2cdd0bd1e94b2ef169ddd2ab7fa54f SHA-1: f4052efc7387432bffa14703a6966d84a27d2901 SHA-256: cd07c2b78ff01f969f8522f1e4bbabeb5cc6dd48f57aaa222e35f0653c8f8f82
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'free generators' or 'game hacks' for popular games like Minecraft and Coin Master. The document body and embedded URLs reinforce this lure, aiming to entice users to click through to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or redirection attack, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/479516143/how-to-get-minecraft-java-free-game-hack In PDF document text
    • http://adravietnam.org/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://adravietnam.org/images/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/free-robux-site_GM431946152.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_003_off00004be9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BE9 32196 bytes
SHA-256: 900521da91cb031bbd3e4c38bb3edb0761e1882516db32710ee918c44a5109b0
font_01_sfnt_off00008ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA4 3056 bytes
SHA-256: dd24a0ab94df4552e459bd06fd01b0fd3f021c1d51d1d64407070e735974a028
font_02_sfnt_off00009917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9917 18152 bytes
SHA-256: f45ec97da20a8e70f6e7437c3ced33d3bcbd99aef5af4daf3be0ff08d51a9e58

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