Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe62e39db9f78c2…

MALICIOUS

PDF

46.0 KB Created: 2021-05-10 20:12:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9044909c391ae2f6b4271dc42552e634 SHA-1: 36d672b87e63c085d495778926a25f5197c65bf4 SHA-256: cbe62e39db9f78c2b2961310ce710b4de06adfae6da803c0ffaf2a979af68561
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically targeting users with lures for free Robux and game hacks. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF's structure and embedded links indicate an attempt to lead the user to a potentially harmful site, likely for credential harvesting or further malware delivery.

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-promo-codes-2021-game-hack In PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • https://www.elearning-min2jakpus.sch.id/__statics/gudangsoal/files/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/free-robux_GM431946152.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://www.elearning-min2jakpus.sch.id/__statics/gudangsoal/files/roblox-18_GM431946152.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://www.elearning-min2jakpus.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning-min2jakpus.sch.id/__statics/gudangsoal/files/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://www.elearning-min2jakpus.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://elearning-min2jakpus.sch.id/__statics/gudangsoal/files/is-roblox-free-on-ps4_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_003_off00004ca5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA5 27648 bytes
SHA-256: 4e06d7ee5ad46372ac90fdfaed3b704d1f23974e2993bb4c77bf3cdbc50d7404
font_01_sfnt_off00008f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F76 19004 bytes
SHA-256: 2ae4233163b81a205a597c97f5f9bceef85a21038461a0399da8d1b6d9f39b0a

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