Malicious PDF — malware analysis report

Static analysis result for SHA-256 22013bc1ed6b9767…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 09:22:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 74aeb35ec4b62686693ed3be6a1136f5 SHA-1: ac160149f7c7c847bc033d7148def46159a8df9a SHA-256: 22013bc1ed6b976754b7c71152502bf84941af240f330cc12ccf4baee7d1844d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and generators. The primary lure is the URL http://netcdn.tw/app/406889139/coin-master-free-snacks-link-game-hack, which leads to further malicious PDFs. The ML classifier also strongly indicated maliciousness.

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-snacks-link-game-hack In PDF document text
    • https://nendientu.com/public/upload/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/roblox-hack-unlimited-free-robux-tickets-no-survey_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/roblox-apocalypse-rising-cheats_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/cheat-online-roblox_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/roblox-hack-2021-june_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/how-to-use-hack-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/how-to-get-free-robux-cards_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/pokemon-go-free-roam_GM1094591345.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-jump-hacks-for-roblox_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_off000030b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B7 22716 bytes
SHA-256: c4dae6bda18c09ca1b2de7b75cb9466bf70036cb729df31da58ee423765ed9f3
font_01_sfnt_off0000635f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635F 18168 bytes
SHA-256: 49b3383b0ff20e2977df0bc058e05ba6d34df220f914051dd6e6d9430a583dba

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