Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae38a4ea15189713…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 13:06:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 46b30820e1038d6621d6a02dd31dd9a5 SHA-1: e1789fbfd3b36a9be037f20e20d650f58526f33d SHA-256: ae38a4ea151897136688dce1aec77a17e2bfe63f081075715e07584053287456
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users into clicking on what appear to be game-related hacks or currency generators. The primary redirector URL, http://netcdn.tw/app/479516143/how-do-you-get-minecraft-for-free-game-hack, is flagged as malicious. The document body and heuristics indicate a link farm strategy, likely to distribute further malware or engage in phishing. No scripts were extracted from this sample.

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/479516143/how-do-you-get-minecraft-for-free-game-hack In PDF document text
    • http://library.smpn2-byl.sch.id//repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/how-to-get-robux-free-on-ipad_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/how-to-hack-roblox-flee-the-facility_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/treasure-hunrt-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-win-attack-madness-in-coin-master-hack_GM406889139.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_off00002fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE3 21916 bytes
SHA-256: fa058afe079ba08c93369240c2da16c3461abfbab4c47fe7ab7401dd2a9ddf2e
font_01_sfnt_off0000601b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601B 18632 bytes
SHA-256: e84ad285f341e438f0b586e1c1e30148e409f2a1e76744d3c2f453220977198e

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