Malicious PDF — malware analysis report

Static analysis result for SHA-256 da85aaf163a5164e…

MALICIOUS

PDF

43.0 KB Created: 2021-05-17 02:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fa5d4dded750043cacbab87dbc3356b1 SHA-1: 71b23a1146eefb6fe7b792b29bebfea5776e585c SHA-256: da85aaf163a5164e675b26509c2e5b6f78ced6abe2e54164fb09c03670cbe666
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The primary malicious link identified is https://netcdn.xyz/app/406889139/free-spin-and-coin-blogspot-game-hack. The presence of embedded URLs and the critical heuristic firings strongly indicate a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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/free-spin-and-coin-blogspot-game-hack In PDF document text
    • http://www.colma.it/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://www.colma.it/images/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://www.colma.it/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.colma.it/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://www.colma.it/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.colma.it/images/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://www.colma.it/images/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.colma.it/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://www.colma.it/images/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.colma.it/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://www.colma.it/images/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://www.colma.it/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.colma.it/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.colma.it/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.colma.it/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.colma.it/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.colma.it/images/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.colma.it/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://www.colma.it/images/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.colma.it/images/coin-master-free-coins-and-spins_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
stream_003_off00004b32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B32 25640 bytes
SHA-256: cc5750c381740627c075b8e9fd9cebb007b215c56e1d7e0b03befb210b4818b5
font_01_sfnt_off00008589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8589 18412 bytes
SHA-256: cb02a0a7339bbfb7c1b17cd559942ff19a97950a5bd5d5859ed5395f6b052c82

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