Malicious PDF — malware analysis report

Static analysis result for SHA-256 03312db7b1a4cd83…

MALICIOUS

PDF

43.7 KB Created: 2021-06-08 18:20:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4e1e597db0f489c863e76bd4e1407d6e SHA-1: 9f8ccdaa30b1664c466ea5432195c94c2502540a SHA-256: 03312db7b1a4cd83f86bda80d1aeccf4b75b0dd383b7ea424e7ae3a7ee5da653
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are identified as malicious redirectors, specifically promoting game hacks and cheats. The presence of these links, combined with the ML classifier flagging this PDF as malicious, strongly suggests a phishing or social engineering attempt to direct users to potentially harmful content. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/roblox-admin-hack-pastebin-game-hack In PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-free-robux-no-downloading-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/pubg-uc-buy-paytm_GM1330123889.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.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_004_off00004cf7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CF7 24968 bytes
SHA-256: b621b68e1359a1e744fda94e81ec8c705a7c7973fe8e47d0d24dbaa14852f69c
font_01_sfnt_off000085c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C9 18992 bytes
SHA-256: c02525575e7f50856c3732d651ba36ef28ab477b17a61aa0f41b0624284a553b

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