Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f141da280cf39b…

MALICIOUS

PDF

35.9 KB Created: 2021-07-04 07:50:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 22e2abda132c9ad44c1a916dcf3b9246 SHA-1: ae624ea243fc31bd0180bbbabdc1d9d11ce929d1 SHA-256: 70f141da280cf39b07176ab99c71525d8bf591712357a053a256e8b80591ad68
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and SEO link farms, disguised as game hacks and free item generators. The primary link, http://netcdn.tw/app/431946152/roblox-top-game-hack, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to these lures and embedded URLs, indicating an attempt to drive traffic to 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.
  • 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/431946152/roblox-top-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-one-piece-millenium-hack-devil-fruit-esp_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/super-saiyan-simulator-2-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robloxcom-how-to-get-free-robux-only-today-ad_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hacks-exploit-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-how-to-get-obc-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-hack-lumber-tycoon-2script-inserter_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-robux-ohne-handynummer_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/denis-free-admin-town-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/create-obby-free-robux-roblox-studio_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-inventroy_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-cheats-how-to-get-free-gear_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hack-roblox-como-tener-robux-gratis-2021-noviembre_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-hack-tools-in-all-games_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
font_00_sfnt_off00003635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3635 22584 bytes
SHA-256: 6df673a75118ae35f7938e587a0d8ccc430e74042483fb39d0feaf3ba71c33d9
font_01_sfnt_off00006874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6874 18664 bytes
SHA-256: 028abfa79713013eb59317e371661b23d220663c7b341c282357ca2b06f49a86

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