Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03a4236f8bc5b6e…

MALICIOUS

PDF

51.7 KB Created: 2021-06-07 11:37:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 992d3d4dfe3710dcbd0799f375e2f4ad SHA-1: 09d446e4d8171da6fbd7a6af402ab4191a1ac922 SHA-256: c03a4236f8bc5b6e36ec2b0fbd93868d5abfd7f74606109a31d571aa8ce382b5
200 Risk Score

Malware Insights

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

The PDF document uses a lure related to game hacks and generators to trick users into clicking a malicious link. The presence of a fake CAPTCHA or human verification prompt is a common social engineering tactic to encourage user interaction. The embedded URL leads to a known malicious redirector, likely serving as a gateway to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/how-to-install-hacks-roblox-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-admin-lua-script-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-accounts-with-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005495.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5495 25620 bytes
SHA-256: f653e00e6a8792a7d6ef1660a3422354e3aabaa45e7745b181136dfebe36a2f7
font_01_sfnt_off00008f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7E 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000992a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x992A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA63B 18452 bytes
SHA-256: f57472eaad65f37ff94c0eeec6bfc202d650b88b40d52b569472874972b4c66f

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