Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea6030255ab495a…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 12:53:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: caa0c5fd41f39cf94bf2092cfa01f98c SHA-1: 182ccbe3d15c9bf7e600a642d2469fbf858068fb SHA-256: cea6030255ab495a981eb7e093497eb82149a06401138db00f6b1ad579db1f28
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to a known malicious infrastructure, likely to lure users into downloading further malware or engaging in scams. The document body explicitly mentions 'Coin Master 15 Free Spin Link' and 'game hack', aligning with the heuristic findings of a redirector lure. No scripts were extracted, but the presence of malicious URLs and the nature of the lure suggest a phishing or scamming attempt.

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-15-free-spin-link-of-last-5-days-game-hack In PDF document text
    • https://tpp.com.tw/image/data/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/kakashi-roblox-roblox-face-free_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/roblox-muscle-simulater-cheat-codes_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/roblox-tower-battles-money-hack_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/roblox-the-lords-of-nomrial-hack_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-to-get-free-robux-javascript_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/roblox-hack-robux-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/roblox-player-radar-hack_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/earn-robux_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/hack-for-assasin-roblox_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
stream_002_off0000303d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x303D 23160 bytes
SHA-256: 2f6408f4dc7ef184333a1f7f5b7e6990c6f24aedfd66b461eca98127302a71b8
font_01_sfnt_off00006482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6482 18932 bytes
SHA-256: ab5bf67824d9f1de49592764067eca3c5a6c622e8f4c11d8ed5e999977e69fe8

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