Malicious PDF — malware analysis report

Static analysis result for SHA-256 572077dd4198c979…

MALICIOUS

PDF

44.3 KB Created: 2021-06-04 01:40:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 75a683e3883fab38a33b18f63f1fb23b SHA-1: d815b4aa244a7b68b12bde230875e750524799fc SHA-256: 572077dd4198c9795aefb87d106f35930d14e92cfd4f35d6e9d02540b3172ecf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body, though partially corrupted, contains text related to "Coin Master" and a prominent URL that is also flagged as malicious. The presence of these links and the lure suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/free-coin-master-coins-and-spins-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-earning-websites_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_004_off000050ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50AB 25660 bytes
SHA-256: c9e5a4f0eb7101c7259615227d972b534715b5661c56e9ea67718f9b8210a6bf
font_01_sfnt_off00008b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4B 18060 bytes
SHA-256: 11bd500b33c169b65e53ecddb4cd7ac7428d9a9bdc32d60ba78f45c9260aee9d

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