Malicious PDF — malware analysis report

Static analysis result for SHA-256 35564dff4dd99fb5…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 16:52:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 447a9e94b919c4788154c9e8c40229e9 SHA-1: 9d43069ab89d676b1fa607f1ebf2ded3c8625f0d SHA-256: 35564dff4dd99fb5184e307317c2b9161096a9d2afad4ff5febd9e04538826d5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins'. The heuristic firings confirm these links point to known malicious redirectors and a game hack lure. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves tricking the user into clicking a link that leads to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-daily-spins-2021-game-hack In PDF document text
    • https://www.summerland.com.tw/upload/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/hack-prison-miner-roblox_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-blue-hair-roblox_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-roblox-rom_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-admin-on-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/with-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/edm-reaper-free-robux-april-2021_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/cheat-strucid-roblox_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/cool-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/robux-hack-online-no-survey_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-hack-lvel-up-in-naruto-beyong-roblox_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-roblox-avatar-clothes_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/noob-vs-pro-vs-hacker-vs-god-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00003199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3199 23076 bytes
SHA-256: dccd5e81905e0f60325f6018438a4e95ca71a998b6c5dcd5fda56c13c41357a9
font_01_sfnt_off0000658d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658D 19000 bytes
SHA-256: fe44b8dc0286c11eb9316a1d3eb321ff3ae19d9947d0f6ad420bc13b052cb0ec

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