Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d58506d5fa3be97…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 08:34:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a76adcbd21f839e79ba9dbf1e0c6d6b5 SHA-1: 6ab13f49fd2f0cbef0e3e4b4bc59cf34e1c56d13 SHA-256: 8d58506d5fa3be97cf4e5d0e3f61f708b959f36c0c44b2488c3877b26e20609b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free currency generators. The primary lure is a 'Coin Master Spin Hack Link' pointing to http://netcdn.tw/app/406889139/coin-master-spin-hack-link-game-hack. This pattern suggests a social engineering attack designed to trick users into visiting potentially harmful sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/406889139/coin-master-spin-hack-link-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-codes-no-offers_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/custom-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-non-hack-robux-generators_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-guest-arms-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hacks-roblox-dragon-ball-rage_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-into-others-peoples-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/meepcity-roblox-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_002_off00003152.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3152 22964 bytes
SHA-256: 778b269b88afd7a2ed3aef7bf56a3c83863ee96aa67a1e12ba68799fc70241ff
font_01_sfnt_off00006509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6509 18180 bytes
SHA-256: a132cedd825d849e0d721dfbb1ea0ac908be68f445a4640ebf6ea6c953a82746

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