Malicious PDF — malware analysis report

Static analysis result for SHA-256 571cf121f830102c…

MALICIOUS

PDF

52.3 KB Created: 2021-06-09 00:56:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4eaea341582a3e8e79ab0a6bc9f06890 SHA-1: 279bb1de7d24535b8de15b766416c31f31d57455 SHA-256: 571cf121f830102c5dcf09e2c547f614f8f42d297a3de1eafa7d5b25943647e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, masquerading as game hacks or generators. The heuristic firings confirm the presence of malicious redirector links and a lure for free game items. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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.tw/app/431946152/roblox-free-t-shirt-template-game-hack In PDF document text
    • https://gigbagwinkel.nl/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/roblox-strucid-aimbot-hack-download_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/freer-tiktok_GM835599320.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/ore-tycoon-2-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/free-robux-master_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/clients-minecraft_GM479516143.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/free-robux-cards_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
stream_004_off000053d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53D9 38032 bytes
SHA-256: 31f5f0333612d90e22e1407a7fc8fd50493909bed275433fcb168dff0de22b77
font_01_sfnt_off0000a87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA87A 19000 bytes
SHA-256: e742f169f1b26ed91538511a0920079cec500db8a2125b9baaefc1870790ed2d

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