Malicious PDF — malware analysis report

Static analysis result for SHA-256 72440368e3b0723f…

MALICIOUS

PDF

45.9 KB Created: 2021-05-11 01:58:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1b359ba7b31c13ecc1e6cb7e25d8bc8f SHA-1: 0709e4d33db571f05a0849b20e220dfc2f52d6ae SHA-256: 72440368e3b0723f3f04a1fb0e754ad4a12e60334a9af0b20dcb864eef8c8f5f
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors, masquerading as game hacks or generators. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to manually execute a command or open a link, bypassing macro restrictions. The embedded URLs and the nature of the lures suggest a social engineering attack aimed at tricking users into visiting malicious sites, potentially leading to further exploitation or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/minecraft-pe-hack-client-ios-game-hack In PDF document text
    • http://learningarabic.co.uk/images/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/daily-free-spins-for-coin-master_GM406889139.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_off00004e67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E67 25324 bytes
SHA-256: 7bb6743afd1b5363adc83400c0e3e2d2753c503394175c86c8c52a653d7dce0f
stream_005_off000091c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x91C5 18108 bytes
SHA-256: e50e7ffc92e693739b6a1d5d28be47030cd8670fbb45c47044b0ac4b43b5d3d6
font_01_sfnt_off000087b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B5 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a

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