Malicious PDF — malware analysis report

Static analysis result for SHA-256 df276e6c735b2d9e…

MALICIOUS

PDF

35.7 KB Created: 2021-07-07 03:05:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0a4d4a9be8cfa8bc1a38e238fe861e27 SHA-1: 0747e9cd2afac5ac80b1c681497625b9b77c61ce SHA-256: df276e6c735b2d9ed2e9b250d18e484f8829942d224fb694fa8c8aa345b756af
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users to malicious redirectors and link farms, often disguised as game hacks or cheats. The document body and heuristics indicate a clear intent to drive traffic to potentially harmful websites, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/406889139/hack-to-send-gold-cards-on-coin-master-game-hack In PDF document text
    • https://alimi.com.tw/upload/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/1x1x1x1x1-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-cheat-in-eviction-notice-roblox_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-roblox-jazwares-codes_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/all-free-roblox-games_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/cheats-fro-csgo-in-roblox_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-hack-to-get-admin-on-roblox_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-jailbreak-money-hack-check-cashed_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-do-people-get-robux-without-hacking_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-hack-for-high-rank_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-name-for-free-gun_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F2 23568 bytes
SHA-256: 477bc513b3b007b916b3fd3a39789c8ece5d8e43b7c6d1624ac702dcccb84dac
font_01_sfnt_off000068ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EA 18252 bytes
SHA-256: 2404e29e1a45577db7d9d1851bba941e7ce9a3146c2b043007f3b8db4c3efe9a

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