Malicious PDF — malware analysis report

Static analysis result for SHA-256 789f53dd78972a44…

MALICIOUS

PDF

46.2 KB Created: 2021-06-03 19:55:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1a5eba73b73016fbd9a77c6908e1a3dc SHA-1: 537ffa0d58925a63bbffb4360a4b84dc531086ba SHA-256: 789f53dd78972a445171122e9dd909b5b438c29b256dd9093357d72f357728fd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, disguised as a lure for game hacks and generators. The presence of a visual download button and the overall structure suggest a phishing or scam attempt. While no scripts were explicitly extracted, the PDF's nature and embedded URLs strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/479516143/minecraft-free-edition-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/freespinandcoin-blogspot-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f5b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5B 25740 bytes
SHA-256: b4bf663f98663e2113783d4ab241946428af1f6631a93f2028ac8038fbff10b4
font_01_sfnt_off0000893a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893A 2820 bytes
SHA-256: 34dd21cbcbbf8680f9624d5ddfa25e49232e6768200f74ddacb5347fd7a5f6dc
font_02_sfnt_off000092db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92DB 17884 bytes
SHA-256: b79fa13a8014c541ecaa50cf2ea2342c8b7987f05c534eedd8f1cc9ff0cdeb29

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