Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd728a03a6d1a78…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 12:32:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8762a9cd4bc0bcc003588df696de62d8 SHA-1: 16acefe45a62d86cee8d261c440aba5fd3bda713 SHA-256: afd728a03a6d1a784d4c8f2efe07acfcd947a02dfe225a8385e7254763ed3f19
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and generators. The primary malicious URL identified is http://netcdn.co/app/431946152/free-vidoe-star-egg-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful content or further stages of infection.

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.co/app/431946152/free-vidoe-star-egg-roblox-game-hack In PDF document text
    • http://zercalo.org/images/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-roblox-cinema-4d-rig_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/tower-defens-roblox-simulator-hack_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/pokemon-go-free-high-level-account-hack_GM1094591345.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-jailbreak-play-for-free_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/easiest-to-download-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/roblox-join-players-that-arent-freind-hack_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-and-coins-2021_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_off000030e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E0 21856 bytes
SHA-256: 557e2490cd2eb963c01a0c3a4877b7078965657407a13fa64ed0bda2954dcceb
font_01_sfnt_off0000611e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611E 19184 bytes
SHA-256: 3188aa1fb8ac5066944e333dd11d187c100f229150fb8e103349b7efa0610c4a