Malicious PDF — malware analysis report

Static analysis result for SHA-256 749a0588ffab0f89…

MALICIOUS

PDF

45.8 KB Created: 2021-05-13 14:04:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 36bc5ac3856645ea75694ae085769dff SHA-1: 57199d2cdef8dc7376fa9dd2b7e45741f605f19f SHA-256: 749a0588ffab0f89df82f17940d04ff9009b423c010045f514d750e2138ba12e
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free coins". The document body and embedded links strongly suggest a lure for users interested in game exploits, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the presence of malicious redirector links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.
  • 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) or Microsoft license-boilerplate 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.xyz/app/406889139/how-to-get-free-coins-in-coin-master-game-hack In PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-heaven_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://bali.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D8E 25352 bytes
SHA-256: 76bd4f10d0de39817c4fb0e2325e2f350b9624a1858097a6d6b9cd569606b08e
font_01_sfnt_off000086fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FC 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off000091da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91DA 17872 bytes
SHA-256: ea6dcb3ab890178a05547e3161835c8edeffae3732ad32b35eba99407f3e1bd5