Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c509b4f88ac3fb7…

MALICIOUS

PDF

251.2 KB Created: 2021-07-05 08:43:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7cc369668e59dea8633b976c471d1269 SHA-1: e1b539cfb51a3532e32eb372e126608c128fef5c SHA-256: 7c509b4f88ac3fb7562d03e4ce0301aeeb7bcae7dfecf88c63b12fbceccd23cc
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1555.003 Credentials from Password Stores

The PDF file contains a link to 'http://netcdn.tw/app/1330123889/pubg-uc-zarah-game-hack', which is presented as a 'free generator / game hack' lure. It also displays a fake CAPTCHA and an MFA lure, consistent with credential phishing or session token theft. The document impersonates the 'Apple' brand, but the link host does not match, indicating a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0098

Heuristics 8

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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-zarah-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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-zarah-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/roblox-jailbreak-free-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-robux-generator-download_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-retrieve-hacked-account_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-2021-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/find-roblox-on-computer-hack-in-escape-from-the-demon_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-no-human-verification-website_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/cupcake-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-promo-codes-2021-october-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-pastebin-no-wait-or-suscribe_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-2021-no-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-free-blue-hair_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-working-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/cheats-in-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-and-coins-group_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_off00037fe2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37FE2 26180 bytes
SHA-256: 2bfbf3f3458a86d7ea6f27e7f7d0f13c95f14a9ae55bea38c7077ec839b24fb9
font_01_sfnt_off0003bd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BD59 18384 bytes
SHA-256: f96ee8927e0f1c4703b1f505c8a381bb60a4205ee29e68f91cd89b5780a0d535

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