Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4f558c83b7e4fc…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 03:16:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 216ac6f6f7b6c905d009ed3e403a126d SHA-1: 20b379acf1247b8237bfdbcc1b6dddfa8b53f1c7 SHA-256: 6b4f558c83b7e4fca6711c63343cec14d8b81b523d7458dba02efd08e0aa6084
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a redirector URL that is flagged as malicious and associated with game hack lures. The document body, though partially garbled, also contains the same URL, reinforcing the lure. The presence of a visual download button heuristic further supports the deceptive nature of the document, aiming to trick users into clicking the malicious link.

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/479516143/real-minecraft-for-free-game-hack In PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/infinite-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/fairy-tail-ultimate-adventure-roblox-how-to-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/how-do-i-hack-someones-roblox-acc_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-answerscom_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/roblox-jailbreak-money-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/free-robux-not-a-scam-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/hack-para-scp-site-61-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/roblox-hack-website-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/free-robux-no-very_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/hacks-for-big-paintball-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/synapse-roblox-hack-2021-download_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/free-robux-no-scam-100-percent-real_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/cheat-codes-on-xbox-one-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/how-to-catch-a-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mialfalahum.sch.id/__statics/gudangsoal/files/follow-button-gives-free-robux_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_off000033d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D3 22512 bytes
SHA-256: a419a11522367acdcd740b1e8380a89d6fc66ad9b8cacc8b85de705bf13a4ecf
font_01_sfnt_off0000660c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660C 18072 bytes
SHA-256: d68fa57ec8c523f38d0fdf73d76ca4dd8403ad985b9656b7645d5bf8dd81d83c

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