Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad3e2b3d7de222d…

MALICIOUS

PDF

42.2 KB Created: 2021-05-14 16:36:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 57cc08a241a44562734370e45c302dc6 SHA-1: 0a9b64c013a457fdde7ebc3d37e75cc0bb1a59a4 SHA-256: cad3e2b3d7de222d86d6410c7131914a49c7c5f0f15226f510b56b205d29fc5b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The document body and extracted URLs suggest a social engineering tactic to trick users into visiting these sites, likely for further malware delivery or credential harvesting. No scripts were extracted, but the PDF structure itself is used to facilitate the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-free-spin-and-coin-link-today-game-hack In PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/minecraft-114-download_GM479516143.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/www-rbx-com_GM431946152.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • https://e-learningman12jakarta.com/__statics/gudangsoal/files/pig-master-free-coins-and-spins_GM406889139.pdfIn 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_off00004bd6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD6 23852 bytes
SHA-256: 13973aa0b63b631a9881abe9f7612dd31895ec87f9946ab3eb9a097042f49bcc
font_01_sfnt_off000081f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F4 18412 bytes
SHA-256: 5606d742d49c2f618a839db89fb2f395f675f912dcc06d31cfc3972fb9700339

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