Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b07d403d86bebf…

MALICIOUS

PDF

49.8 KB Created: 2021-06-11 04:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 200697331e8e02a8ab8dcc2fb4ef622f SHA-1: c4bb2c7a76c4e0fd43f74a08afa3174e7130da06 SHA-256: 86b07d403d86bebfdee755358a431f144e12abc40e6f73325de9439704ae7759
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' for Roblox. The document body, though heavily obfuscated, contains references to these lures and the authoring application suggests it was generated programmatically. The primary goal appears to be directing the user to a malicious URL that likely serves a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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-money-hack-pc-game-hack In PDF document text
    • http://immo360grad.com/images/alone-battle-roytale-roblox-hacks-script-copy_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/collect-robux_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/wurst-115_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-followers-on-tiktok-app_GM835599320.pdfIn PDF document text
    • http://immo360grad.com/images/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-hack-roblox-no-downloads-2021_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-account-roblox-with-robux_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005136.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5136 26112 bytes
SHA-256: e9ded65d4fef380a4348edd154489f1abcc61135bdb730c6e61610baf3a55323
font_01_sfnt_off00008d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4F 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_02_sfnt_off00009ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EBF 18712 bytes
SHA-256: abf9e401f254fa774a160dfb89bac237101e9d526849dd2d53495fa13385b75b

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