Malicious PDF — malware analysis report

Static analysis result for SHA-256 d36d742a4d57ea1f…

MALICIOUS

PDF

36.4 KB Created: 2021-07-04 00:59:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a42f0261376a607793cae247afda985d SHA-1: 4ca6fd8ecad7fc0c05d70f5b9eeef52cd1942058 SHA-256: d36d742a4d57ea1f7187050e60720e21a0497502b7a3b9ec25e948088dd751df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a game hack or generator. One of these links, http://netcdn.tw/app/406889139/free-coins-coin-master-link-game-hack, is identified as a malicious redirector. The document's content and structure strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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-coins-coin-master-link-game-hack In PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-get-free-broken-egg-in-roblox-rpg-world_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-hack-your-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification-on-ipad_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/roblox-robux-hack-generator-2021-november_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/botton-complex-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mimunggulan-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-run-roblox-hack-script_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_off00003830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3830 23120 bytes
SHA-256: 81f3127b52159a1cc03ae1d6bedd2fd863e4928915168c0bc43cac7f6f3e4746
font_01_sfnt_off00006c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C34 18168 bytes
SHA-256: b0fd03f2280421e1c8ba538a35ec3a9afcfe64ddb22ef6ef66156561f264a38b

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