Malicious PDF — malware analysis report

Static analysis result for SHA-256 996b5c23e8a4a1b4…

MALICIOUS

PDF

43.6 KB Created: 2021-05-17 03:29:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: be8a611839d63907f1401e761b6a74bd SHA-1: b5380787e17a00c56dc924f5d7a86cae18f33a71 SHA-256: 996b5c23e8a4a1b47c8df78225db73b6a406fb2d7c5bc569ab1cb6b5d34eefb4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a malicious link disguised as a 'free generator / game hack' lure, which is a common tactic for phishing or malware distribution. The link points to a known malicious redirector infrastructure. Although no scripts were explicitly extracted, the PDF structure and embedded link suggest an attempt to redirect the user to a site that likely hosts a second-stage payload or initiates a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/games-for-robux-game-hack In PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/mcpe-com_GM479516143.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.kkaccessoriesuk.com/uploaded_files/userfiles/files/free-robux-ad_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_off00004973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4973 26856 bytes
SHA-256: 768433919eef47d18686bd4fd354bc8491bfe751a81a138e2fa0d95236a8230d
font_01_sfnt_off0000875f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875F 18500 bytes
SHA-256: ad01f7040899aac4b12b67a2e6a3a9146063970ead780f552734f1276374e517

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