Malicious PDF — malware analysis report

Static analysis result for SHA-256 9142572e5c50d7b1…

MALICIOUS

PDF

44.8 KB Created: 2021-05-13 02:18:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 19277bafd52f934732d0ab43745dbfda SHA-1: 9a448c1da16767f762df244289245839981180bf SHA-256: 9142572e5c50d7b165c0bb9fd73fbe4d36cb714704b0b8599284a3829d7239e0
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to known malicious infrastructure, masquerading as a game hack generator. This lure is designed to trick users into visiting a potentially harmful site. The presence of multiple embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/406889139/coin-master-daily-rewards-game-hack In PDF document text
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_off00004a9d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9D 24368 bytes
SHA-256: 2256b042573ef9ac3ef8e4d99c42491cf30094393f37f76eb2d9784165361e82
font_01_sfnt_off000082a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A1 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C52 18308 bytes
SHA-256: 56c9764dfe9b7751766473bcf998f7f39304bff1cf37f7eb72c18d79890b8eac

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