Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2c3e86c49331d6…

MALICIOUS

PDF

251.7 KB Created: 2021-07-09 14:38:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2bde16245e8fe9c0a2409317f25fc38a SHA-1: 99bb754e6660d9876a7dbdfc809800ba7bcf22d2 SHA-256: 3a2c3e86c49331d69dd70b87ae307d10cf2d033b7cb5acc27832c410f3899695
258 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

This PDF document employs a game hack lure to trick users into clicking a malicious link, which then presents a fake CAPTCHA and MFA harvesting page. The link impersonates the Apple brand but directs to unrelated infrastructure, indicating a credential phishing attempt. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing workflow.

Machine Learning

  • Nyx PDF Classifier clean score 0.0098

Heuristics 8

  • 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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.tw/app/1330123889/pubg-uc-60-game-hack.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/1330123889/pubg-uc-60-game-hack In PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/can-you-evolve-trade-pokemon-without-trading_GM1094591345.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/como-hackear-robux-en-roblox-2021-facil-y-rapido_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/roblox-what-to-do-if-you-get-hacked_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/bot-group-hack-roblox_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/roblox-rtd-awakening-cheats_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/roblox-hacken-und-dafr-free-robux-bekommen_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/free-robux-script-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/how-to-use-cheat-engine-67-on-roblox_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/roblox-system32-host-file-hack_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/how-to-get-free-avatar-animations-roblox_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/hack-roblox-genrator-no-survey2021_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/great-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/coin-master-free-cards-and-spin-link_GM406889139.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_024_off000381d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x381D8 26180 bytes
SHA-256: 56a136e43ffa6544e40750c312e9d3bf6a96a49080ba54b187250f9eb0f333a3
font_01_sfnt_off0003bf3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BF3E 18464 bytes
SHA-256: bd0f3d617e58ab6330bfe440d21eb2a3f25143ec4f3a7696f063e8aebe3adfb1

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