Malicious PDF — malware analysis report

Static analysis result for SHA-256 842d611953d77825…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 16:02:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 514b57274dc37da9484c3cea0f63c11b SHA-1: 76fe44ea68f5076f1ea5284e069f490928950dd4 SHA-256: 842d611953d778259f5de58dc3cfd294c3fab556e1766cd1f0f11fed52de5b7e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, masquerading as a game hack generator. The document body and extracted URLs strongly suggest a phishing or scam attempt, likely to lead users to download further malware or compromise their accounts. No scripts were extracted, but the PDF structure and embedded URLs are indicative of malicious intent.

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/free-daily-spins-coin-master-game-hack In PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/robux-website-no-hack_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/robux-hacks-2021-that-work_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/softonic-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/roblox-jailbreak-money-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/descargar-roblox-mod-hack-apk_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/games-with-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/games-that-give-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/robux-hack-2021-working_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/roblox-que-tem-hacker_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/free-robux-play-games-earn-points_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/roblox-play-as-guest-free-download_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_off0000314e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x314E 22840 bytes
SHA-256: 48ff5dcc915a7c5cef42001cdfe22979e6918f6afa05db1a1b3ab3650970ec00
font_01_sfnt_off000064cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CB 18596 bytes
SHA-256: 4ad8fd882529be3d23a027a1092be38fd3a881cb86878c09c64331b24aa9a906

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