Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a75a032f6af8f26…

MALICIOUS

PDF

44.5 KB Created: 2021-05-12 19:04:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7eb6bfb05f76fcd877a6b39b0929a3cb SHA-1: d587833b949433d36fa27788b495a05eff600ec1 SHA-256: 3a75a032f6af8f269939783cdbec9cfa59a8bed5634c5c6e76f23d5fc528cc3f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, identified as malicious redirectors and potentially malicious content related to game hacks and free currency. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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 https://netcdn.xyz/app/406889139/free-spins-coin-master-links-game-hack In PDF document text
    • https://dientubentre.com/public/upload/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/get-robux-now_GM431946152.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/cm-free-spins_GM406889139.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://dientubentre.com/public/upload/files/roblox-hack-apk_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A2 25380 bytes
SHA-256: 0d4985f93ecf02659f667f2edada249e57bffa877e9b1d41da805b9ce3ed3855
font_01_sfnt_off0000824c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824C 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C36 18056 bytes
SHA-256: 07f1a9832fff0ce02b8ea8bcbd6448fb7022c7ac6c85a00fb5b887865844234a

Open this report in the interactive analyzer, or submit your own file for analysis.