Malicious PDF — malware analysis report

Static analysis result for SHA-256 990e6cb328ba3fb7…

MALICIOUS

PDF

226.4 KB Created: 2021-07-08 22:08:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f94c5ac689e777b9e379ce760a713e0d SHA-1: c7bbdb37d1ac4a9d43ba821403bf1c185c234850 SHA-256: 990e6cb328ba3fb763e1dab13cb7235241076001a0677f7bd9ce197a42d8459f
250 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document uses social engineering tactics, including a fake CAPTCHA and a lure for a game hack, to trick users into clicking a malicious link. This link redirects to a known malicious domain, indicating an attempt to deliver a payload or phish for credentials. The document's content and heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 7

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/1094591345/pokemon-go-free-promo-code-game-hack In PDF document text
    • https://ibelive.tw/image/data/files/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/original-roblox_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/coinmaster_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/buy-free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/trickynicky-free-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/working-cheat-engine-bybass-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-to-hack-theme-park-tycoon-2-roblox_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/robux-hack-2021-phone_GM431946152.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00031e6e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E6E 25576 bytes
SHA-256: aa315034669b4a7518c8b466098e58e2ac3dd3fd207a13057cf874f8d9d4656c
font_01_sfnt_off00035a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35A72 18532 bytes
SHA-256: 13db1c569e6337ebf241592a37fe2f1e67c11d96dbc0326935230b03655663d9

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