Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8703d8ad2572b2…

MALICIOUS

PDF

33.6 KB Created: 2021-06-30 13:05:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 11cecfdca189fd5690098f9faf3cc418 SHA-1: 6b8f7fc81de33ac20644e9f7fb7f0229819def64 SHA-256: da8703d8ad2572b2ccdca26e583ce10ef4e85922c72da1d579be431cd1513347
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free generators'. The document body text and extracted URLs reinforce this lure, aiming to trick users into visiting these sites. While no scripts were extracted, the presence of malicious links and the ML classifier's high confidence score indicate a high likelihood of this document being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/how-do-you-hack-roblox-game-hack In PDF document text
    • https://www.vista-design.hr/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/wurst-minecraft_GM479516143.pdfIn PDF document text
    • https://www.vista-design.hr/files/help-im-being-cheated-on-by-some-roblox-girls_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/free-robux-easy-robux-today_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://www.vista-design.hr/files/roblox-free-shirts-and-pants-2021_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/tiktok-free-videos_GM835599320.pdfIn PDF document text
    • https://www.vista-design.hr/files/how-do-you-hack-robux_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://www.vista-design.hr/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://www.vista-design.hr/files/is-there-any-working-robux-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/dungeon-quest-cheat-2021-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A22 23336 bytes
SHA-256: 9a5e6c2ae215d4684446c3c83d22d05be8382a808ab760dab12627395ffa31a4
font_01_sfnt_off00005df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF1 19292 bytes
SHA-256: 9995eaa591a4ae7360538d13bc69f9b48a4c6000d4d0fc373ba7f602d67ad74d

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