Malicious PDF — malware analysis report

Static analysis result for SHA-256 23dd477a67b3e591…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 11:29:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 88f13ae3667c353f5cfc8b7f263f99f9 SHA-1: 362a46cc12b064ee00231ff80e005d3dddccdde9 SHA-256: 23dd477a67b3e59182ab193007fbf280d49aad2db9bc8bb837b991eae797d32f
220 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 a "coin master hack" lure. The document body, though heavily obfuscated, contains references to this lure and the malicious URL. The presence of multiple heuristic firings related to malicious redirects and lures strongly indicates an attempt to trick the user into navigating to a compromised site, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/406889139/coin-master-hack-with-facebook-login-game-hack In PDF document text
    • http://library.atim.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-scam_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/como-hackear-counter-blox-roblox-offensive-en-espaol_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-no-verification-2021_GM431946152.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
stream_004_off000051c7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C7 24420 bytes
SHA-256: 98215a65316cb1abc4fcf1c9fd924438d27be8e1bfa765f21d19cc21cc251792
font_01_sfnt_off00008976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8976 18688 bytes
SHA-256: 749705fc09f79508956169531e0f53da1cf92baf18e5ef239c7c9518cbf3631e

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