Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb7f71550e2005b…

MALICIOUS

PDF

44.5 KB Created: 2021-05-11 13:07:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6febdc7d511390959cd771260f53f6b8 SHA-1: f711bbf28df673e57c3b8c5d6630788ad8891dc1 SHA-256: acb7f71550e2005b694fe1154896caa8f9d1661204a4edc0ef4cdf84586bd3b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that point to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The ML classifier also flagged this PDF with high confidence. While no scripts were directly extracted, the embedded links and the nature of the lures suggest an attempt to redirect users to sites that likely host further malicious content or phishing pages.

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 https://netcdn.xyz/app/431946152/free-robux-codes-2021-not-used-game-hack In PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/rbxdemon_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/hack-avatar_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/free-robux-script_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/coin-master-links-free-spins_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
stream_003_off00004ce6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CE6 26336 bytes
SHA-256: d942e6a42adbb72039372be17e677789e84be4ad7694ce8e4ec050a33883d54e
font_01_sfnt_off000089c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C6 18880 bytes
SHA-256: 342a41804753b243bf13fa7c19db71c7debbb8fa80f4750c82899b0ccf7aa343

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