Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7ba44203b44104…

MALICIOUS

PDF

226.6 KB Created: 2021-07-05 19:39:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7de5a5c3d0eb5ee71513c2a76782333b SHA-1: 69de48e2bd979ab0cfa2b1748cd27ad0c9d91b05 SHA-256: 4e7ba44203b441042e544d6b347a33a791a17e0b6181468f6bd6641032b44065
250 Risk Score

Malware Insights

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

The PDF document contains multiple lures designed to deceive the user. It presents a fake CAPTCHA and links to game hack generators, which are common social engineering tactics. The embedded URL http://netcdn.tw/app/1094591345/pokemon-go-free-coins-no-verification-game-hack is identified as a malicious redirector, indicating the likely intent is to lead the user to a site that will either download a second-stage payload or attempt credential harvesting.

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-coins-no-verification-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hacked-download-apk_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/instant-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-roblox-bee-swarm-simulator-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/como-hackear-robux-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-god-mode-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-hack-2p_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-generator-2021-roblox-hack-no-survey_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_off00031ecc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31ECC 25576 bytes
SHA-256: e9db0eabb53e16a5b2db069dd5eba30c9b0187d4542c6d5393e57389f5da0e81
font_01_sfnt_off00035ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35AC5 18716 bytes
SHA-256: 29af60a417cd343f4ae20323f2f4686ec1ad0dcdf132dbef3757e53c78be7deb

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