Malicious PDF — malware analysis report

Static analysis result for SHA-256 deccf0b1001620a5…

MALICIOUS

PDF

44.9 KB Created: 2021-06-11 08:53:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 81ba9ecf080cfa1de43b10ade1c1fe07 SHA-1: 08075c5ffc970a4e8d999c3fd2c92f45b54417a6 SHA-256: deccf0b1001620a5a4e03bb1f5b513f715e53690774be446665e27abdacd34d7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a visual call-to-action, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious. The primary URL points to a file named 'roblox-node-cheat-engine-game-hack', indicating a lure for users seeking game cheats, which is a common social engineering tactic. No scripts were extracted, limiting the analysis of direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-node-cheat-engine-game-hack In PDF document text
    • http://achauco.vn/public/upload/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-online_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/robux-today_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-100-spin-hack_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
font_00_sfnt_off00005368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5368 24236 bytes
SHA-256: 2e7733fa267e21a64feaaf6ba6526062f4b51a02c4e3b696a42b978ccad1ec80
font_01_sfnt_off00008aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEA 18864 bytes
SHA-256: 42e8130c354c927b45d94af70c28936bcc67c9d05e171ab5e6bcffe98a1c228a