Malicious PDF — malware analysis report

Static analysis result for SHA-256 44168bbadacb1e5a…

MALICIOUS

PDF

34.2 KB Created: 2021-07-07 21:03:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3a0931db38111e5d7f0e510c76fdb8d2 SHA-1: 665397d67845d854b26e1c64ae07f6439c891a6a SHA-256: 44168bbadacb1e5a86f962bcf14d48053fc12460a63d285a68ec0bc1f1281599
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to a known malicious domain, masquerading as a 'free generator / game hack'. The document body and heuristics indicate a lure for free game currency or hacks, likely to lead users to a phishing or malware download site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/how-to-get-free-robux-2021-game-hack In PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/how-to-earn-free-robux-giftcards-no-scam-or-clickbait_GM431946152.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-robux-place_GM431946152.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://www.harveenent.com/uploaded_files/userfiles/files/roblox-hack-robux-download-ios_GM431946152.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
font_00_sfnt_off00002e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5C 22136 bytes
SHA-256: c23cc294878a1b3c2015391f1350db8ab60419ba35f65a8d03c596cb9190cdee
font_01_sfnt_off00005f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F50 19384 bytes
SHA-256: 140efaa19506918d6e23c6f72929d04436b836b18eb9dc717a4a442c24a9fe38

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