Malicious PDF — malware analysis report

Static analysis result for SHA-256 1160b483e8cdd881…

MALICIOUS

PDF

35.5 KB Created: 2021-07-07 08:45:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 11d3f0327f81c50e4500cd9c3e76907e SHA-1: bdb850ae5c5be55a37d97a6efee3d62a0845cdcd SHA-256: 1160b483e8cdd88133755af1e03300e66d8254c0af019882678d2b340dfcaaad
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into downloading game hacks or cheats, ultimately redirecting to a malicious domain. The document body and heuristics indicate a phishing attempt disguised as a free download for popular games. While no scripts were extracted, the embedded links and the nature of the lures strongly suggest a malicious intent to redirect users to potentially harmful content or further phishing 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/479516143/minecraft-free-download-unblocked-game-hack In PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/cookie-hack-roblox-players-on-galaxy-note-8_GM431946152.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/pubg-uc-download_GM1330123889.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/roblox-how-to-be-copletely-white-free_GM431946152.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/simplysarc_GM479516143.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/free-robux-no-download-no-survey-trackid-sp006_GM431946152.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/roblox-hack-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/free-robux-and-tix-generator_GM431946152.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/free-clothes-codes-for-roblox_GM431946152.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/roblox-hacking-peobel_GM431946152.pdfIn PDF document text
    • https://healthcare.kyst.com.tw/image/data/files/coin-master-free-chest-link_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
font_00_sfnt_off00003283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3283 23060 bytes
SHA-256: 21a60322eb2e798609a6c9cf05418cfa26d8c73c28ae78cae19312c8caa1cc84
font_01_sfnt_off000065d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D0 19092 bytes
SHA-256: b89de8ec978c760e16c728bf26098254cc88868f8675788ef266acc2a2d3d026

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