Malicious PDF — malware analysis report

Static analysis result for SHA-256 4113b2e17c6825dd…

MALICIOUS

PDF

35.1 KB Created: 2021-06-22 07:04:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4e8715fdc3d9058912fe49cf9a4fa3f9 SHA-1: 08e54dec46f498ae439567e2df9fa76e279d0e43 SHA-256: 4113b2e17c6825ddea902df519e8920c324df4d82dc34acf157aa11374e828f8
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that are identified as malicious redirectors, specifically luring users with promises of game hacks and generators. The document body and extracted URLs reinforce this lure, directing users to potentially harmful content. While no scripts were extracted, the embedded URLs and heuristic firings strongly indicate a phishing or scam attempt designed to lead users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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) 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 http://netcdn.co/app/431946152/robux-hack-2021-real-no-human-vertification-game-hack In PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-hack-in-to-notleah-roblox-acount_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-roblox-roblox_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/roblox-arsenal-hacks-free_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-get-a-free-diablo-on-ud-westover-roblox_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
font_00_sfnt_off0000316e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316E 21924 bytes
SHA-256: b4b4468de5f15ff2ac9fa012b146b2298cbc56fb0749ebcccc4390d00fcbd73f
font_01_sfnt_off000061f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F1 19816 bytes
SHA-256: 0a0cf34a1771199e95729ff35aa340299eae6b51ddd78a86ad34f11bbd570873

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