Malicious PDF — malware analysis report

Static analysis result for SHA-256 65568409cc7af719…

MALICIOUS

PDF

34.1 KB Created: 2021-06-19 00:58:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9d4238ab6997c32fca741003d4259bd1 SHA-1: 083d54155583bfccbbdc14d1a02ec3a14942f623 SHA-256: 65568409cc7af71947e3896b979e9c16c7f00178cb8235791a9db3f101875c9e
220 Risk Score

Malware Insights

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

This PDF document contains numerous links, including a critical link to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/roblox-hack-mobile-download-game-hack. The document body and heuristics indicate a lure for game hacks and free generators, suggesting a phishing or malware distribution attempt. The presence of a visual download button further supports a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/roblox-hack-mobile-download-game-hack In PDF document text
    • http://achauco.vn/public/upload/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/roblox-how-to-get-a-shirt-for-free-with-bc_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-free-spin-best-link_GM406889139.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_off00002ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CCD 22448 bytes
SHA-256: 67c9449ecd5facdb324de769d76748d55543cdbb6f7de48a4fe562d21858368e
font_01_sfnt_off00005ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF5 19476 bytes
SHA-256: edf8b09ccdc06f15a3fd6112e59f2d8faf958b3056b004bdb9093e776778d557

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