Malicious PDF — malware analysis report

Static analysis result for SHA-256 399a9d5781516b85…

MALICIOUS

PDF

42.0 KB Created: 2021-05-11 23:01:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d305ac146c53ba9027823cfe9ba71887 SHA-1: 6a0e76070f9f8a446ef59baa3d73bf854ab9de0a SHA-256: 399a9d5781516b85718d82c594d452eb46b227544cb3ace6fd9779206e6665da
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free currency, which is a common lure for phishing and malware distribution. The primary link directs to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to lead the user to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/free-robux-no-verification-game-hack In PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/collect-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-get-free-roblox-hair_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_003_off00004967.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4967 24104 bytes
SHA-256: 4b24b8d5da735160160d3bd10bbbd763bb1b497e90475492bb4c8c7d740743de
font_01_sfnt_off000080a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A9 18600 bytes
SHA-256: 361892a278de990f6dfe9fe9f512a0ec39aeba1740037781b92f32c6ad2b5051

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