Malicious PDF — malware analysis report

Static analysis result for SHA-256 062b377fdb6287e8…

MALICIOUS

PDF

34.2 KB Created: 2021-07-08 17:32:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bc00561abd18ecb2a4ad31cef8084d2f SHA-1: c4ad4c8c7964d46e8e98c6f7a01a8cf23d3d3efa SHA-256: 062b377fdb6287e813f642a5565a0b3950c3ea7cac32ffe332a3edd23b8c37df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector pointing to 'http://netcdn.tw/app/406889139/ac-market-coin-master-hack-game-hack'. This URL is presented as a lure for game hacks, suggesting a social engineering tactic to drive users to potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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/ac-market-coin-master-hack-game-hack In PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/roblox-hack-android-1-com_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/oprewards-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/robux-sites_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/free-online-roblox-death-games_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/free-free-robux-robux-robux-scam_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/hack-in-roblox-download_GM431946152.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/hack-configuration-robux_GM431946152.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/robux-adder_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/free-robux-generator-no-download_GM431946152.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/minecraft-bedrock-for-free_GM479516143.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
stream_002_off000030fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30FC 22740 bytes
SHA-256: 73837cb1d31d2b911418b8ec540263de302edc4fbfbc492958aab0f1d1d053e7
font_01_sfnt_off0000639d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639D 18004 bytes
SHA-256: 51c403ccbf2095c129d261ca0667a18c16ab70be1117906c570f2d9d1feb2da9

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