Malicious PDF — malware analysis report

Static analysis result for SHA-256 4077c2f125f2a4d6…

MALICIOUS

PDF

23.3 KB Created: 2021-07-05 13:51:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b4c4d40d9f127a4797c524efa7daad86 SHA-1: a91dab662725c326a1de12af154729493554fd28 SHA-256: 4077c2f125f2a4d65d053c1887e2c31302ee843a5bbbcfb123f4bb4b17a05d7b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and free in-game currency. The primary lure appears to be a 'Coin Master Free Spins And Coins' generator, which redirects to a known malicious domain. The document's structure and embedded links suggest it is designed to trick users into visiting potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 3

  • 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.
  • 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/406889139/coin-master-free-spins-and-coins-for-today-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/yahoo-games-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/games-that-give-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-app-download-ios_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-2021-no-human-verification-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/gaming-cheats-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002fc6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FC6 22024 bytes
SHA-256: 647bfc1eeb5c4690922dff359b2f55bb5538155621ebf74cd0f508731d7f76af

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