Malicious PDF — malware analysis report

Static analysis result for SHA-256 5648e6bf69c16619…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 12:46:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 27fff8a10eae290dbff4a579cf8b05f7 SHA-1: 361c0a1a09ced44eb45181b63d5489c76baacd4f SHA-256: 5648e6bf69c166195a71337f5272f6334eca3bea85c5458196b51aa5f8003310
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, linking to a known malicious redirector. The document body explicitly mentions 'free coins and spins' and provides the malicious URL, indicating a phishing attempt to lure users to a potentially harmful site. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-coins-and-spins-in-coin-master-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/titan-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-gear-cheat_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/comment-ont-fais-pour-avoir-un-cheat-sur-robloxcheat-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-cheat-tool-download-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/22-500-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-jailbreak-hack-how-to-through-walls-hack-new-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/pastbin-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-in-speech-bubble_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/outfit-for-roblox-for-freecom_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF3 23164 bytes
SHA-256: 760fc8759cd190f4fbbe654229ba53effcec692b7911b574835d633f8fe0d273
font_01_sfnt_off0000641e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641E 18348 bytes
SHA-256: 3394dff2a2236ff5ebd01f8571ec2988f1167f0416feeddb65e6ed7fa563ded8

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