Malicious PDF — malware analysis report

Static analysis result for SHA-256 be6899f75f66f00b…

MALICIOUS

PDF

44.1 KB Created: 2021-05-14 12:10:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6f077a535b8c0059ee9c3eb7a3783107 SHA-1: 67ca54ef79e9bbdcc58929aeb769cc73996af145 SHA-256: be6899f75f66f00bc28015c4f339bc3c61b69ca6b113721a5e4caaee1d6bf289
200 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs that redirect to a "free generator / game hack" lure, impersonating Facebook. This is a common tactic for credential phishing or distributing malware. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent. The document's primary function appears to be directing users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/free-coin-master-spin-generator-game-hack.
  • 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/free-coin-master-spin-generator-game-hack In PDF document text
    • http://gods-own.org/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/roblox-gang_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/get-robux-com_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/robux-for-offers_GM431946152.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_off000048a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A0 24552 bytes
SHA-256: 8e21eb5ed4e6224fd27bb794b35b3e55d624ce9bedab9ae03191593fa17c477a
font_01_sfnt_off00008155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8155 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B06 17884 bytes
SHA-256: 16176773f619a96cd0466f624f42028099c05d0ee65210103b314f40a63b5fdf

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