Malicious PDF — malware analysis report

Static analysis result for SHA-256 b930ca02392e85a1…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 05:01:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c952b678ef118d24e82cc5bf75b8dbc5 SHA-1: 117e171b59506511771b062cd9649d2a5b158dc2 SHA-256: b930ca02392e85a143ecdd0b311bb18901fa60e03c62aa238ef9b31b72d1120f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on a "free generator / game hack" which redirects to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the embedded URLs and the nature of the lure suggest a phishing or scam attempt, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

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/free-coin-master-cards-link-game-hack In PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/wurst-112_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-alt-accounts-free_GM479516143.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
font_00_sfnt_off00004c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C9D 24388 bytes
SHA-256: da50693c6b81ce09242130260d751e0c9b1b96b811ab917a4de15b3d4e214455
font_01_sfnt_off0000840a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x840A 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00008dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBD 18056 bytes
SHA-256: 9071f122c67917f0b34eb320479b1427d840cc0eff292ee930c0f68fbd18a3b2

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