Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9bf495cf4d01ed0…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 20:18:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 98cd8e371934ee30bd3d9ff9e9706865 SHA-1: e1db50368379f46d8deffe1690005d7520253e47 SHA-256: c9bf495cf4d01ed0629821b285fd220326c016f17e81292693b129921aac7569
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a "robux-for-kids-game-hack". The document body, though heavily obfuscated, contains references to the malicious URL and appears to be a lure for users seeking in-game currency or cheats. The primary malicious activity observed is the redirection to a potentially harmful site, likely to facilitate further malware delivery or phishing.

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.online/app/431946152/robux-for-kids-game-hack In PDF document text
    • http://www.flytec.com.py/download/files/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.flytec.com.py/download/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.semrush.com/prices/In 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_004_off00004f97.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F97 24624 bytes
SHA-256: 5e06a0c0326ec78802d8253b329189332aedbb9534b1cb81d4c2b8021099fdd0
font_01_sfnt_off000087e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E3 18308 bytes
SHA-256: 8a34bf7029799339b91ee5bbc9e7150d15a201a0a283206b71f5bacd63347ffe

Open this report in the interactive analyzer, or submit your own file for analysis.