Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb68158198e5d723…

MALICIOUS

PDF

43.9 KB Created: 2021-05-19 06:45:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e81e995133b84c8afc6f385b48a2a78d SHA-1: 68e62d6217c9c1e92d351403689c1bb4965bb741 SHA-256: fb68158198e5d7239aace5b036be04ebc43da348d4de11b53195548feee2a8da
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics suggest a social engineering lure, specifically a 'game hack' or 'generator' scam, designed to entice users to click these links. The 'ClickFix' heuristic indicates the document may also instruct users to manually execute commands, further supporting a malicious intent to lead the user to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/how-to-get-minecraft-windows-10-for-free-2021-game-hack In PDF document text
    • http://soma.com.ua/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://soma.com.ua/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://soma.com.ua/images/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://discord.ggIn 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_003_off00004dfa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DFA 25292 bytes
SHA-256: da4ad0ffa87918624ff4dc6e6665c8eeb46fca6ebaaeea4bef21948707300d5c
font_01_sfnt_off00008831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8831 18648 bytes
SHA-256: 354bb2c2c4fae14b5c7df711c8f5a389dfe67cd832e4a835714c7b2f7ea7fa4d

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