Malicious PDF — malware analysis report

Static analysis result for SHA-256 234eb1c84c556821…

MALICIOUS

PDF

250.8 KB Created: 2021-07-06 18:08:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9a8edcaea0273b2f4ce6cc8dc0df947d SHA-1: a2594e1e9c9cb568b374bec23708e6e41cf9c92f SHA-256: 234eb1c84c556821c51f8f38d96769c86c7ea1c141d52a09d0874056589a2a53
258 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1555 Credentials from Password Stores T1078.004 Abuse Elevation Control Mechanism: MFA

The PDF document contains multiple high-severity heuristics indicating a credential phishing and MFA harvesting lure, impersonating the brand 'Apple'. It directs users to a malicious redirector URL, http://netcdn.tw/app/1330123889/pubg-uc-malaysia-murah-game-hack, which is associated with known malicious infrastructure. The document also displays a fake CAPTCHA and uses urgency lures to trick users into clicking the malicious link.

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-malaysia-murah-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-malaysia-murah-game-hack In PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pastebin-free-robux-hack-no-wait_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/work-in-a-pizza-place-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-2021-november_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-for-roblox-free-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-treasure-hunt-app_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-speed-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/murder-island-hack-roblox-script_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/compile-roblox-hack-dll_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-hacks-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-a-person-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-hack-mad-city_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-de-fly-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-without-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/actually-free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-on-roblox-with-proof_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_024_off00037d94.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37D94 25928 bytes
SHA-256: e28ad33c6624881ff1748560fac602cd364ae89fd275b269519910227a9f2860
font_01_sfnt_off0003bab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BAB4 18864 bytes
SHA-256: 2f752031445595992e09d0bd029e2d73f05d5294d310b70a211a1916a25bc363