Malicious PDF — malware analysis report

Static analysis result for SHA-256 4963100368527fa2…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 15:59:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9c162cac12f44552544919cc7e47bbac SHA-1: 6d3618d6734a6c991aa58dcc7bde2befd76bcca5 SHA-256: 4963100368527fa20d2b1dff119def652226a0764c6378565b870f9b62217810
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to a malicious redirector URL. This redirector then serves further malicious PDF documents, indicating a chain of malicious content delivery. The document body and heuristics strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-to-earn-free-spin-in-coin-master-game-hack In PDF document text
    • http://elibrary.perludem.org//repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-to-get-20210-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-game-com_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-geometry-dash-roblox-odes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/goo-recording-for-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-legit-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-august-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-no-survey-no-password-no-virus_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-best-free-outfits_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-lab-experiment-hacks_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/rare-free-links-to-coin-master_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_002_off00003265.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3265 23164 bytes
SHA-256: be6b34aef02ec313b80cdbd0cd0874c9a5f75adba620289d653d097d380bf4d8
font_01_sfnt_off00006668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6668 18336 bytes
SHA-256: e175444d8625d5933ae29808464a0db72f90ee30ef4af4272c37160f9cf9ff60

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